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Word Lengths Starting With P

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paan(India) A psychoactive preparation of betel leaf combined with areca nut and/or cured tobacco, chewed recreationally in Asia; such a preparation served wrapped in the leaf.pabulation(obsolete, rare) The act of eating or feeding.pacation(formal) pacifying, placationpaccanAlternative form of pecan (tree).paceman(cricket, Australia, India) A fast bowler; one who specialises in bowling fast.pachycephalosaurianAny dinosaur of the suborder Pachycephalosauria.pachymaranA glucan, derived from Basidiomycetes, used as an enzyme substratepachyrhinosaurinAny of the dinosaurs of the tribe †Pachyrhinosaurini, a clade of centrosaurine ceratopsids.pachyrostranAny ceratopsid dinosaur of the clade Pachyrostrapacidamycin(medicine) Any of a group of uridyl peptide antibioticspacifastinAny of a group of serine proteinase inhibitors found in arthropodspacificationThe process of pacifying.packetisationAlternative form of packetization.packetization(signal processing) The act or process of bundling data into packets according to a specific protocolpacketman(nautical) A seaman aboard a packetpackman(archaic) Someone who travels with a pack, especially a travelling salesman.packmenplural of packmanpacktrainAlternative form of pack train.paconiflorinMisspelling of paeoniflorin.pacsin(biochemistry) Any of a family of cytoplasmic phosphoproteins that play a role in vesicle formation and transportpactamycinAn antitumor antibiotic isolated from Streptomyces pactumpactionA pact, an agreement.padawanAn apprentice or student Jedi.paddymelon(Australia) Any of various cucurbitaceous plants, especially Cucumis myriocarpus, native to Africa but naturalized in inland Australia.paddywaggonAlternative form of paddy wagon.paddywagonAlternative form of paddy wagon.pademelonAny wallaby of the genus Thylogale of small macropods.padmasanAlternative form of padmasana.paduakanAlternative form of padewakang.padymelonAlternative form of pademelon.paean(by extension) Any loud and joyous song; a song of triumph.paediatrician(Commonwealth) Standard spelling of pediatrician.paenibacillinA particular bacteriocin produced by the bacterium Paenibacillus polymyxa.paenibactin(organic chemistry) A catecholate siderophore produced by Paenibacilluspaeon(poetry) A foot containing any pattern of three short syllables and one long syllable.paeoniflorin(organic chemistry) A glycoside found in Paeonia lactiflora, used in herbal medicinepaeoninAlternative form of paeonine.paerucumarin(organic chemistry) An isonitrile derivative of coumarinpaganRelating to, characteristic of religions that differ from main world religions.paganisationAlternative spelling of paganization.paganizationThe act or process of paganizing.paginationThe act of creating pages for a document, book, etc., or determining when to truncate text on the pages.pahanA village priest of Sarna Dhorom.pahlwanAlternative form of pehelwan.paibanA clapper made from several flat pieces of hardwood or bamboo, used in Chinese music.paigon(MLE) An untrustworthy person; a person who deliberately acts against one's interests.paillassonA kind of straw bonnet.paillonA thin leaf of metal, for use in gilding or enamelling, or to show through a translucent medium.pain(uncountable) The condition or fact of suffering or anguish especially mental, as opposed to pleasure; torment; distresspaindemain(obsolete) A kind of fine white bread.paintathonAn event where volunteers come together to paint.paisanAlternative form of paisano or paisana.pajamahadeen(informal) Bloggers whose aim is to fact check and challenge the mainstream media establishment.pajeonA Korean pancake made with green onions.paladinA heroic champion, especially a knight.palaeoaeolian(geomorphology, climatology) Relating to, or caused by, ancient windspalaeobasinAlternative form of paleobasin.palaeodistributionAlternative form of paleodistribution.palaeoencephalonAlternative form of paleoencephalon.palaeolagoonAlternative form of paleolagoon.palaeomarginAlternative form of paleomargin.palaeomigrationAn ancient migration (human or animal)palaeomonsoonAlternative spelling of paleomonsoon.palaeonemerteanAny nemertean of the order PalaeonemerteapalaeonutritionAlternative form of paleonutrition.palaeoplainAlternative form of paleoplain.palaeopolyploidizationThe development of polyploid organisms in the geologic pastpalaeopositionAlternative form of paleoposition.palaeoprecipitationAlternative form of paleoprecipitation.palaeopteranAny winged insect of the division PalaeopterapalaeoreconstructionAlternative form of paleoreconstruction.palaeosubduction(geology) A subduction that occurred in the geologic pastpalaeovegetationAlternative form of paleovegetation.palaestrianAlternative form of palestrian.palagonitization(geology) Transformation of lava to palagonite by weathering.palankeenArchaic form of palanquin.palankinArchaic form of palanquin.palanqueenObsolete form of palanquin.palanquin(India, chiefly historical) An enclosed human-borne litter or sedan chair, a large box with a chair, couch, or bed raised on horizontal poles and used as a mode of transport.palatalisationNon-Oxford British English standard spelling of palatalization.palatalization(phonology, countable) An instance of pronunciation in which a sound is palatalized.palatian(archaic) palatialpalatizationSynonym of palatalization.paldoxinAn inhibitor of an enzyme that detoxifies phytoalexins.paleaodistributionMisspelling of paleodistribution.paleencephalonAlternative form of paleoencephalon.palen(ambitransitive, rare) To make or become pale.palenquinArchaic form of palanquin.paleoaeolianAlternative spelling of palaeoaeolian.paleoamericanAlternative form of Paleo-American.paleobasinAn extinct river basinpaleocanyonAn ancient canyon.paleochristianDescribing the early Christian church, its people, architecture and culture, etc.paleocirculationAncient oceanic and atmospheric circulation patterns.paleocon(informal, politics) A paleoconservative.paleoconnectionA prehistoric connection, typically between paleoriverspaleodeposition(geology) The formation of a deposit in the distant pastpaleodistributionThe distribution of organisms in prehistoric times.paleoelevation(geology) Elevation (of land) that occurred in the geological past.paleoencephalonThe most ancient part of the brain.paleoeolianAlternative spelling of palaeoaeolian.paleoevolutionAncient evolutionpaleohexaploidisation(biology) hexaploidisation that occurred in prehistoric timespaleohexaploidizationAlternative form of paleohexaploidisation.paleohumanancient (prehistoric) humanpaleoindianAlternative form of Paleo-Indian.paleoindicationSynonym of paleoindicator.paleolagoonAn ancient lagoonpaleolibertarianA supporter of paleolibertarianism.paleoliquefactionAncient soil liquefaction caused by earthquakes.paleomagneticianA specialist in the field of paleomagnetismpaleomammalianOf or relating to those structures of the brain's limbic system that (according to the triune brain model) arose early in mammalian evolution and were responsible for the motivation and emotion involved in feeding, reproductive behavior, and parental behavior.paleomarginThe edge of a paleolake or paleolagoonpaleonemerteanAlternative form of palaeonemertean.paleonutritionThe study of dietary nutrition in ancient or primitive peoples.paleoplain(geology, geomorphology) A buried erosion plain; a particularly large and flat erosion surface.paleopolyploidizationAlternative form of palaeopolyploidization.paleopopulationThe population of an organism in prehistoric timepaleopositionThe geographical position of a place in prehistory (before being subjected to continental drift)paleoprecipitationprecipitation (typically, rain) in ancient timespaleoreconstructionA reconstruction of a paleoenvironmentpaleosedimentationAncient sedimentationpaleosouthernRelating to the south as it was in prehistoric timespaleotetraploidization(genetics) Conversion to a paleotetraploid formpaleotherian(paleontology, archaic) Of or relating to Palaeotherium.paleovegetationThe vegetation of an area in the distant pastpalesimianAlternative letter-case form of Palesimian.palestrianOf or relating to the palestra, or to wrestlingpalettization(computer graphics) The act or process of palettizing.palfreymanA groom who specializes in palfreys or good quality riding horses.paliferminA human recombinant keratinocyte growth factor produced in Escherichia coli.palificationThe act or practice of driving piles or posts into the ground to make it firm.palingenesian(rare) Relating to palingenesis.palladation(organic chemistry) Any reaction in which a palladium atom is bound to an organic compound.palladian(mineralogy) Containing tetravalent palladium.palladin(biochemistry) A protein that is a component of actin-containing microfilaments that control cell shape.palladoan(mineralogy) Containing divalent palladium.palletisation(British spelling) Alternative spelling of palletization.palletization(logistics) The act or process of palletizing.palliationThe alleviation of a disease's symptoms without a cure; temporary relief.pallidoluysian(anatomy) Relating to the corpus pallidus and the corpus Luysiipallilysin(biochemistry) A lysin present in Treponema pallidumpalloidinMisspelling of phalloidin.palmarian(archaic, formal) palmary; superiorpalmarumycin(organic chemistry) Any of a group of fungal metabolites that are derivatives of 1,8-dihydroxynaphthalenepalmation(uncountable) The quality of being palmate.palmdelphin(biochemistry) An isoform of a paralemminpalmellin(organic chemistry) A pigment found in the alga Porphyridium purpureum (formerly Palmella cruenta).palmification(botany, historical) The fertilization of date palm trees by suspending male clusters from wild dates over the females.palmin(organic chemistry) Triglyceride of palmitic acidpalmitin(organic chemistry) A glyceride of palmitic acid.palmitolein(organic chemistry) The triglyceride of palmitoleic acidpalmitoylation(organic chemistry) modification by reaction with a palmitoyl grouppalmitylation(organic chemistry) modification by reaction with a palmityl grouppalmoleinThe olein fraction of palm oilpalmostatinAny of a group of inhibitors of acyl protein thioesterase and thus of depalmitoylationpalmspanA measure of length equivalent to the breadth of the palm of an average human hand.palonosetron(pharmacology) A drug used in the prevention and treatment of chemotherapy-induced nausea and vomiting.palosuran(organic chemistry) A urotensin receptor antagonist 1-[2-(4-benzyl-4-hydroxypiperidin-1-yl)ethyl]-3-(2-methylquinolin-4-yl)ureapalpation(medicine) The act of feeling or pushing on various parts of a patient’s body to determine medical condition such as the normality of organs or the presence or absence of tumors, swelling, muscle tension, etc.palpebration(medicine) winking of the eyepalpicorn(zoology, archaic) One of the Palpicornia, an obsolete group of aquatic beetles with short club-shaped antennae and long maxillary palpi.palpitationAn abnormal beating of the heart that may be perceived by the patient, a result of excitement, exertion, or illness.palpon(zoology) A dactylozooid.palsificationThe development of palsy.paltensimycinMisspelling of platensimycin.paludianSynonym of paludal.paludificationThe formation or expansion of swamp or bog.palustrianPalustrine, palustral.palynotaxonAny taxon identified by means of spores, pollen etc.palytoxinA marine toxin that can cause ciguatera.pamerinAlternative form of pamri.pampeanRelating to the pampas.panA wide, flat receptacle used around the house, especially for cooking.panaceanHaving the properties of a panacea; solving everything.panadiplon(pharmacology) An anxiolytic drug.panagiarion(Christianity) A paten on which the loaf is placed, used in the 'elevation of the Panagia'.panallergenAny of a class of ubiquitous allergenic substances.panamericanOf or pertaining to the Americas in their entirety.panantigenAbove or over a ductpanasianMisspelling of Pan-Asian.panchanMisspelling of banchan.pancheon(now UK regional) A shallow dish used to stand milk while the cream separates, or in which to bake bread.panchinAlternative form of pancheon.panchionAlternative form of pancheon.panchrestonAn explanation that is used in so many different cases that it becomes almost meaningless.panchromatizationThe process of panchromatizing.pancratian(historical or archaic) athletic (pertaining to athletes)pancrationAlternative form of pankration.pancratistatin(organic chemistry) The compound (1R,2S,3S,4S,4aR,11bR)-1,2,3,4,7-pentahydroxy-2,3,4,4a,5,11b-hexahydro-1H-[1,3]dioxolo[4,5-j]phenanthridin-6-onepancreastatinAn oligopeptide, present in the porcine pancreas, that regulates pancreatic secretionpancreatinA mixture of several digestive enzymes produced by the exocrine cells of the pancreas, composed of amylase, lipase and protease.pancreozymin(dated) cholecystokininpancrustaceanAny animal of the clade Pancrustacea.pancryptodiranSynonym of cryptodiran.pancytokeratinA mixture of monoclonal antibodies that reacts with all cytokeratinspandaedalian(archaic) something wrought with great care.pandan(countable) A screw pine, screw palms (Pandanus spp.).pandanalean(botany) Belonging to the plant order Pandanales.pandation(formal) A yielding or warping.pandemainA high-quality white bread, baked from the finest sifted flour, suitable for the lord of the manor.pandemonianRelating to, resembling, or characteristic of, a pandemonium.pandiculationA stretching and stiffening of the trunk and extremities, as when fatigued and drowsy or on waking, often accompanied by yawning.panegyricon(Christianity) In the Greek Orthodox Church, a collection of sermons for festivals.panegyrizationPraise, exultation.panellation(architecture) division of a feature into separate panels.panelvanAlternative spelling of panel van.pangolinAny of several long-tailed, scale-covered mammals of the family Manidae within the order Pholidota of tropical Africa and Asia.panharmoniconA mechanical musical instrument that could imitate various instruments and generate sound effects.panhumanApplying to all human beings.panicstrickenAlternative form of panic-stricken.paniculoninA particular steroid glycoside.paninA hominid of the genus Pan.pankeratinSynonym of pancytokeratin.pankration(martial arts) An Ancient Greek martial art combining aspects of boxing and wrestling, introduced in the Greek Olympic games in 648 BC.panmanA man who plays steelpan.panmelodion(music, historical) A 19th-century keyboard instrument whose tone is produced by wheels rubbing on metal bars.pannarin(organic chemistry) An organic compound found in some lichens.pannexin(biochemistry) Any member of a family of transmembrane proteins found in vertebrates, homologous to the invertebrate innexinspannexonA group of pannexins that form a channel through the membrane of a cellpannikinA durable cup or other vessel used for drinking made of metal and coated in enamel.panomphaeanAlternative spelling of panomphean.panomphean(archaic) Uttering ominous or prophetic voices; divining.panopsin(biochemistry) An opsin that is expressed in the brain and testispanopticon(figurative, by extension) A place in which people are subject to constant surveillance at totalitarian command.panosialin(organic chemistry) A particular resorcinolic lipid.panpharmacon(dated) A medicine for all diseases; a panacea, a cure-allpanregulon(genetcs) Relating to all regulons of an organismpanretinophotocoagulation(ophthalmology) A laser-based ophthalmic procedure in which photocoagulation is applied across a wide area of the retina to ablate abnormal or ischemic retinal tissue, commonly used to treat proliferative retinal diseases such as diabetic retinopathy.panscan(medicine) Whole-body CT-based imaging, usually used to evaluate injuries in polytrauma patients.pansexualizationProcess of making pansexual.panshinAlternative form of pancheon (“an earthenware dish for milk”).panshon(UK, dialect) An earthen vessel, wider at the top than at the bottom, used for holding milk etc.pansification(informal, derogatory) The process of becoming weak, timid, or effeminate.panstrosinA particular steroid glycoside.pantagruelianHuge, gigantic, enormous.pantaleon(music, historical) A very large dulcimer, invented around 1700.pantalonAlternative form of pantaloon (“buffoon”).pantaloon(countable) An aging buffoon.pantechnicon(chiefly British) Originally pantechnicon van: a van, especially a large moving or removal van.pantetheinylationReaction with pantothenic acidpanthalassan(uncommon) Synonym of panthalassic.panthan(science fiction) A Martian mercenary.pantheon(religion) A temple dedicated to all the gods.pantheonizationAdmission into a pantheon; specifically, interment in the Pantheon in Paris.pantherinAny big cat of the subfamily PantherinaepantinA jumping jack (toy)pantocinAny of a group of peptide antibiotics present in PantoeapantodontanAny extinct eutherian mammal of the suborder †Pantodontapanton(obsolete) A horseshoe to correct a narrow, hoofbound heel.pantotherian(zoology) Any of the mammals in Pantotheria.pantrymanA person in charge of the pantry, or food store, on a ship, train, or other transport where food is kept for passengers and crew. Also in a hospital, school, or hotel, etc.pantrymenplural of pantrymanpantrywomanA female pantryman.pantunSynonym of pantoum.panwomanA woman who plays steelpan.papain(biochemistry) A proteolytic enzyme in papaya fruit which can be used to tenderize meat.papaitanA Filipino soup made with goat or beef tripe and offal, and flavoured with bile.paparazzificationThe process of making or becoming characteristic of the paparazzi.papasanA papasan chair.papaverinAlternative form of papaverine.papayotin(biochemistry) A proteolytic enzyme found in the papaw, resembling papain in its action.paperchainAlternative form of paper chain.papermanA man who delivers newspapers.papern(rare, chiefly UK dialectal) Made of paper.paperpersonA person who delivers newspapers.paperwomanA woman who delivers newspaperspapillationThe formation of papillae.papillonA small dog of a certain toy spaniel breed having large upright ears with a shape that resembles butterfly wings.papionThe mandrill (Mandrillus sphinx)papioninAlternative form of papionine.pappalysin(biochemistry) Any of a class of peptidases associated with pregnancypaprikahuhn(dated) The chicken paprikash, a popular Hungarian dish.papulacandinAny of a class of antifungal compounds found in Papularia species.papulation(medicine) The formation of papules.papulocandinMisspelling of papulacandin.papyrean(obsolete) Alternative form of papyrian.papyrianSynonym of papyraceous, of, similar to, or related to papyrus.papyroxylin(obsolete) Synonym of gun-paper.parabactin(organic chemistry) The bacterial iron chelator (2Z,4S,5R)-N-[4-[(2,3-dihydroxybenzoyl)amino]butyl]-N-[3-[(2,3-dihydroxybenzoyl)amino]propyl]-5-methyl-2-(6-oxocyclohexa-2,4-dien-1-ylidene)-1,3-oxazolidine-4-carboxamideparabasalianSynonym of parabasalid.parabenAny of a group of chemicals used as preservatives in cosmetics and pharmaceuticals, wherein the hydrogen of a parahydroxybenzene molecule is replaced by an alkyl groupparabiathlonAlternative form of para-biathlon.parabolizationConversion to parabolic formparaboson(physics) The equivalent of a boson in any of several parastatistics.parabutoporin(biochemistry) A cationic amphipathic antibiotic peptide present in scorpion venomparacaseincasein coagulated with chymosinparacelsian(mineralogy) A natural polymorph of celsian.paracelsinA peptide antibiotic present in a Trichoderma speciesparachromatin(biochemistry) Synonym of linin (“material that connects the chromatin granules”).paracingulinA protein, a paralog of cingulin, involved in junction assembly and maintenance.paraclausithyronA motif in classical love poetry, the lament of a shut-out lover.paracoccidioidinAn antigen prepared from the pathogenic fungus Paracoccidioides brasiliensisparacoccin(biochemistry) A lectin found in Paracoccidioides brasiliensis.paracolonAny of diverse bacteria of the former genus Paracolobactrumparacomposition(mathematics) An extension of the paralinearization of non-smooth functions, used to flatten pairs of surfaces by changing variables.paraconsistentization(logic, rare) Conversion to a paraconsistent form.paracryptodiranAny extinct turtle of the infraorder †Paracryptodiraparacyanogen(chemistry) A polymeric modification of cyanogen, obtained as a brown or black amorphous residue by heating mercuric cyanide.paradiseanparadisiacalparadisianparadisiacalparadonSynonym of baryton.paradoxicianA person who formulates or uses paradoxes.paraelectromagnon(physics) An electromagnon that is active when in a paramagnetic environmentparaexciton(physics) An exciton whose spin is antiparallel to that of its holeparafermion(physics) The equivalent of a fermion in any of several parastatisticsparaffin(UK, Ireland) A petroleum-based thin and colourless fuel oil.paraffinizationThe embedding of a tissue sample in paraffin wax prior to microtomingparafibromin(biochemistry) A protein that inhibits cell proliferation and suppresses some tumorsparaformalinA solution of paraformaldehyde in waterparafunctionAn abnormal (especially habitual) movement of part of the body.paraganglionA chromaffin body; a small group of chromaphil cells in the abdomen, connected with the ganglia of the sympathetic trunk and the ganglia of the celiac, renal, adrenal, aortic and hypogastric plexusesparaglobinSynonym of paraglobulin.paraglobulin(biochemistry, obsolete) Synonym of fibrinoplastin.paragonA person of preeminent qualities, who acts as a pattern or model for others.paragranulin(biochemistry) A particular peptide sequence within granulinsparagraphizationThe act or result of paragraphizing; arrangement into paragraphs.parahallucinationA hallucination caused by damage to the peripheral nervous system.parahoxozoanAny marine animal of the superphylum ParahoxozoaparahumanA human-animal hybrid or chimera.parahydrogen(physics) The form of the hydrogen molecule (H₂) in which the two nuclei have antiparallel spin; about 25% of hydrogen at room temperature.parainfection(medicine) A condition resembling an infection but not caused by an infectious agent.parainflammation(pathology) inflammation as a response to an external stressparakeratinAn abnormal, pyknotic form of keratinparaklausithyronAlternative spelling of paraclausithyron.paralbumin(archaic, biochemistry) A proteid-like body found in the fluid from ovarian cysts and elsewhere. It is generally associated with a substance related to, if not identical with, glycogen.paralemmin(biochemistry) Any of a group of prenylated and palmitoylated phosphoproteins associated with some cell membranesparalexiconA parallel set of vocabulary within a language, e.g. a formal register, ritual language or secret cant, code switchingparaliana member of an ancient Greek people who lived by the Athenian coast in the 6th century B.C.E.paralipomenon(biblical) Either of the Books of Chronicles in the Old Testament.parallelisationAlternative spelling of parallelization.parallelizationThe act of making things parallel.parallelohedron(geometry) A polyhedron that can tessellate three-dimensional spaces with face-to-face contacts via translations.parallelopipedonA parallelopiped.paralogician(logic) A person who uses paralogyparalogon(genetics) A set of paralogous chromosomal regions, derived from a common ancestral regionparalyzationAlternative form of paralysation.paramagnon(physics) Damped magnons existing in a disordered magnetic state.paramaterisationMisspelling of parameterisation.paramedian(surgery) to one side of the median positionparamedicalizationthe trend of people setting more and more value on alternative medicine and different beliefs about wealth and health, which are not authorized by the medical scientistsparameterisation(British spelling) Alternative spelling of parametrisation.parameterizationThe representation of a curve or surface in terms of a parametric equation.parametrisation(British spelling) Alternative spelling of parametrization.parametrizationThe act or result of parametrizing: alternative form of parameterization.parametron(physics) A type of resonant logic element that may be used to represent a binary digit.paramilitarizationThe process of changing to a paramilitary system.paramodulation(logic) A technique for reasoning on sets of clauses where the predicate symbol is equality.paramomycinMisspelling of paromomycin.paramonomycinMisspelling of paromomycin.paramutation(genetics) A mutation in which a heritable change in one allele is induced by another in the same locusparamylon(biochemistry) A carbohydrate similar to starch, synthesized along with starch by the chloroplasts found in Euglena.paramyosin(biochemistry) A muscle protein, similar to myosin, present in some invertebrates.paran(astrocartography) A latitude where, at some longitude at a given moment in time, two celestial bodies (or mathematical points, or any such bodies'/points' projections onto the ecliptic) were simultaneously one on the horizon and the other at its highest in the sky (culminating) or lowest below the horizon.paranatellonA star or constellation that rises (above the horizon) at the same time as another.paraneopteranAny insect of the superorder Paraneoptera.paraneuron(cytology) An epithelial cell, in taste buds, that can secrete a neurotransmitter but does not have dendrites or an axonparanodin(biochemistry) A transmembrane neuronal glycoprotein that has a role in cell adhesionparanthelionA diffuse whitish image of the Sun, having the same altitude, at an angular distance of about 120° due to reflection from atmospheric ice-prisms.paraovarian(anatomy) In proximity to the ovaryparaoxonAn organophosphorus insecticide, [Diethyl (4-nitrophenyl) phosphate].parapectin(organic chemistry, archaic) A gelatinous substance made by boiling pectinparaphernalianRelating to paraphernalia.parapinopsin(biochemistry) Any of a group of opsins in the parapineal gland of some fishparaplegin(biochemistry) A metalloprotease associated with paraplegiaparapleuronAlternative form of parapleurum.paraprosdokian(rhetoric) A figure of speech in which the latter part of a sentence or phrase is surprising or unexpected in a way that causes the reader or listener to reframe or reinterpret the first part.paraprotein(biochemistry) A protein found in the blood only as a result of diseaseparapteronA small lateral sclerite on the thorax of an insectpararabin(biochemistry) A form of arabin present in agarparareligionA secular belief system having certain aspects of religion.parareptilian(zoology) Of or relating to the Parareptilia.pararescuemanA soldier who parachutes into hostile territory to rescue fellow soldiers.pararescuemenplural of pararescuemanpararosanilinAlternative form of pararosaniline.parasaurolophinAny hadrosaurid of the tribe ParasaurolophiniparasecretionA secretion abnormalityparasessionA session or meeting that runs in parallel with another, or serves as an alternative.parasitation(nonstandard) parasitizationparasitisationAlternative spelling of parasitization.parasitizationInfestation by a parasite.parasitoidisationinfection with a parasitoidparasporinAny of a group of proteins with anticancer activity, derived from Bacillus thuringiensis.parasubstitution(organic chemistry) Any substitution reaction that introduces an atom or group into the para- positionparasuchianSynonym of phytosaur.parasylvianAcross the sylvian fissureparasyntheton(grammar) A parasynthetic compound.paratabulationThe pattern of antapical and ventral plates of a dinoflagellate.parataxon(taxonomy) An artificial taxon used to describe a fossil based on morphology with no relation to genetic reality.paratendonAlternative form of paratenon.paratenonA fatty areolar tissue that fills the interstitia within the fascia where a tendon is located.paraterraformationparaterraformingparathionAn organophosphorus insecticide acaricide, [O,O-diethyl-O-4-nitro-phenylthiophosphate], a powerful, dangerously toxic insecticide.parathyrinSynonym of parathyroid hormoneparatocarpinAny of a small group of prenylated chalcone flavonoids isolated from Euphorbia humifusaparatriathlon(sports) A variant of the triathlon for athletes with a range of physical disabilities.paravalbuminMisspelling of parvalbumin.paravermianRelating to the paravermisparaveterinarianAn assistant veterinarianparavianAny birdlike dinosaur of the clade Paraves, dinosaurs more closely related to birds than to oviraptorosaurs.paravirtualisationAlternative spelling of paravirtualization.paravirtualization(computing) An approximate virtualization in which the emulated operating system has been modified for convenience or efficiency.paraxanthin(archaic, organic chemistry) A crystalline substance closely related to xanthin, once thought to be present in small quantities in urine.parazoan(zoology) Any sponge (of the subkingdom Parazoa)parcelationAlternative form of parcellation.parcelizationAlternative form of parcellization.parcellationdivision into parcels; especially the dividing up of a large amount of land between the inhabitants of it so that each person receives an equal amount of land.parcellizationfragmentation; subdivisionparcen(law, rare) To divide among parcenersparchmentizationThe process of parchmentizing.parchorin(biochemistry) An intracellular chloride-channel proteinpardaxin(biochemistry) A peptide produced by the Red Sea sole, used as a shark repellent.pardonForgiveness for an offence.pareconParticipatory economics.paregmenon(rhetoric) The juxtaposition of words that have the same roots; using cognate words together, such as "curvaceous curves", "my loving and beloved wife", or "he's a manly man".pareiasaurianAny extinct parareptile of the clade †Pareiasauriaparelcon(grammar) The addition of a syllable or particle to the end of a pronoun, verb, or adverb.paren(informal, especially computing) A parenthesis (bracket used to enclose parenthetical material in text).parencephalon(anatomy) The cerebellum.parentation(obsolete) Something done or said in honour of the dead; obsequies.parenthesizationThe action or result of parenthesizing.parentification(sociology, psychology) A process of role reversal whereby a child is obliged to act as a parent to its own parent or sibling.parentizationSynonym of parentification.parergonA piece of work that is supplementary to or a byproduct of a larger work.parfocalizationThe process of making something parfocal.parhelionAn image or reflection.paridonAlternative form of paradon.parietinA cortical pigment of some lichens (genus Caloplaca and Xanthoria parietina, also found in roots of curled dock (Rumex crispus), having an orange-yellow colour and antifungal properties.parietopsin(biochemistry) Any of a group of opsins in the parietal eye of some lizardsparigenin(organic chemistry) A curdy white substance obtained by the decomposition of sarsaparillin.pariglinSynonym of sarsaparillin.parillinsarsaparillinparimionAlternative form of paromoeon.pariphyllinA particular steroid glycoside.parisaponinA particular steroid glycoside.parison(glassblowing) A spherical mass of glass, rolled immediately after being taken out of the furnace.paritonAlternative form of paradon.parkinA traditional soft cake of Northern England, usually made with oatmeal and treacle.parkinsonian(neurology, pathology) Relating to, or appearing to be caused by, Parkinson's syndrome.parkrunAn informal weekly 5 km (2 km for junior parkrun) running event that takes place in a park or similar location.parliamentarian(Commonwealth) A member of a parliament, congress or an elected national legislative body of another name.parliamentarizationThe process of parliamentarizing.parmesanA hard, full-fat Italian cheese from Parma.parnaparin(pharmacology) A particular antithrombotic.parnassian(entomology) A papilionid butterfly of the holarctic alpine genus Parnassius or the subfamily Parnassiinae; an apollo butterfly.parochializationThe act or process of parochializing.parochian(obsolete) parochialparodisationAlternative spelling of parodization.paromoeon(rhetoric) alliterationparomomycin(pharmacology) A mixture of broad-spectrum aminoglycoside antibiotics related to neomycin and produced by some strains of the bacterium Streptomyces rimosus, given orally in the form of the sulfate C₂₃H₄₅N₅O₁₄·H₂SO₄ in the treatment of intestinal amebiasis.paronomasianSynonym of paronomasic.paroophoron(anatomy) A small mass of tubules near the ovary in some animals, corresponding with the paradidymis of the male.parotideanRelating to the parotid gland.parousian(Christianity) Relating to the second coming of Christ.parovarianAlternative form of paraovarian.parpenAlternative form of perpend.parsimonization(mathematics, computing) Conversion to a parsimonious formparsonAn Anglican cleric having full legal control of a parish under ecclesiastical law.partakenpast participle of partakeparten(transitive, obsolete) To involve; impart, give out, bestow; share.parthemollin(organic chemistry) A xanthanolide found in Parthenice mollis.parthenin(organic chemistry) A toxic substance in the flowering plant Parthenium hysterophorus, causing dermatitis and respiratory malfunction in humans, and is toxic to other plants.parthenogenAn organism that reproduces by parthenogenesis.partializationThe act, or the result, of partializingparticipationThe act of participating, of taking part in something.participialization(grammar) The process of participializing.particularisationAlternative spelling of particularization.particularizationThe act of particularizing.partimenA form of tenson in which a question is debatedpartisanAn adherent to a party or faction.partisanizationThe process of partisanizing.partitionAn action which divides a thing into parts, or separates one thing from another.partizanDated spelling of partisan.partnAbbreviation of partition.parton(physics, dated or historical) Any of the constituent particles making up a compound particle, e.g. the quarks and gluons which make up hadrons.parturition(medicine, obstetrics) The act or process of a mother giving birth.partyman(dated outside India, politics) A partisan; a member of a political party or faction.partymenplural of partymanparvalbumin(biochemistry) A small albumin protein of the nervous system that binds calcium.parvin(biochemistry) Any of a class of proteins involved in actin binding.parvipelvianRelating to ichthyosaurs of the clade ParvipelviaparvolinAlternative form of parvoline.parvulin(biochemistry) A small enzyme that catalyses the cis-trans isomerisation of proline peptide bonds.parylationSynonym of poly(ADP-ribosyl)ation.parylenizationTreatment of a surface with parylenepasan(archaic) The gemsbok.pascalizationA method of preserving and sterilizing food through the use of high pressure.pasdaranA Revolutionary Guard (member of the Army of the Guardians of the Islamic Revolution)pasken(Judaism) To rule, decide, opine.passangrahan(historical) A kind of hostel for travellers in Java.passdownA transfer of information or responsibilities from one worker to another, especially between shifts.passeridan(ornithology) Of or relating to the Passerida.passifan(dated, fandom slang) A fan, particularly of science fiction, who watches and reads the genre but does not actively engage in fanac, or fan activity.passionA true desire sustained or prolonged.passivation(chemistry) The spontaneous formation of a hard non-reactive surface film (usually an oxide or nitride) that inhibits further corrosion.passivisation(British) Alternative form of passivization.passivization(US, grammar) The process of rendering into the passive form.passman(British, archaic) One who passes a university degree, but without honours.passportificationThe supply of passports to citizens of another country for national political reasons.passportizationThe act by one country (chiefly Russia) of inducing residents of another country to take up the citizenship of (and possess a passport from) the first country.passwomanA female passman.pastedownThe part of an endpaper that is pasted to a book's cover.pasternThe part of a horse's leg between the fetlock joint and the hoof.pasteurellaceanRelating to proteobacteria of the family Pasteurellaceaepasteurisation(British spelling) Heat-treatment of a perishable food to destroy heat-sensitive vegetative cells followed by immediate cooling to limit growth of the surviving cells and germination of spores.pasteurizationAlternative spelling of pasteurisation.pastillationThe formation of material into pastilles.pastoralizationThe process or result of pastoralizing.pastrymanA man who makes pastry products.patacoon(obsolete) Synonym of pataca.pataphysicianA person involved in pataphysics.patatin(biochemistry) Any of a group of glycoproteins found in potatoespatdown(US, informal) An act of patting somebody's clothes to check for concealed weapons, etc.patefactionThe act of opening, disclosing, or manifesting; open declaration.patellin(biochemistry) Any of a group of proteins associated with cell plate formation during cytokinesispaten(Christianity) The plate used to hold the host during the Eucharist.paternalisationAlternative spelling of paternalization.paternalizationThe act or process of paternalizing.pathion(mathematics) A 32-dimensional hypercomplex number that is a nonassociative extension of a sedenion.pathoadaptationAny of the changes that occur when a bacterium adapts to a new pathogenetic nichepathoadaptionMisspelling of pathoadaptation.pathoantigen(pathology) An antigen that causes diseasepathocidin8-azaguanine, a purine analogue with antineoplastic activity.pathofunctionA pathogenic functionpathogen(pathology, immunology) An agent that can cause disease, especially an infectious microorganism, such as a bacterium, virus, protozoon or fungus.pathologisationAlternative spelling of pathologization.pathologization(medicine) The treatment of a health or behaviour condition as if it were a medical condition.pathoprogression(pathology) The progression of a diseasepathotoxinA pathogenic toxinpaticanThe Philippine fishtail palm (Caryota cumingii).patinAlternative form of patine.patination(sculpture) The application of a patina.patisiranA medication for the treatment of polyneuropathy in people with hereditary transthyretin-mediated amyloidosis.patriarchalizationThe process of patriarchalizing.patriarchisationAlternative spelling of patriarchization.patriarchizationThe act or process of patriarchizing.patriation(Commonwealth) The transfer of a governmental power from a former mother country to a newly independent one.patricianA person of high birth; a nobleman.patriclan(anthropology) A clan, with membership determined by patrilineal descent from a common ancestor.patrikinpatrilateral kinpatrinAlternative form of patteran.patriotizationThe act of becoming patriotic.patritianObsolete form of patrician.patrocination(obsolete) The act of patrocinating or patronizing.patrolmanA police officer, especially a junior officer assigned patrol duty instead of detection or supervision.patrolmenplural of patrolmanpatrolpersonA patrolman or patrolwoman.patrolwomanA female equivalent of a patrolmanpatronOne who protects or supports; a defender or advocate.patronisation(British) Alternative spelling of patronization.patronizationpatronizing behaviour or talkpatroon(US) One of the landowning Dutch grandees of the Dutch colony of New Amsterdam, especially after it became a British possession renamed as New York.pattenAny of various types of footwear with thick soles, often used to elevate the foot, especially wooden clogs.patteranAny of several coded signs left along a road or on a non-Roma house by one Rom to another. The most common ones consist of crossed sprigs (usually of different trees or shrubs) indicating, for example, a direction travelled.patternModel, example.patternationThe act or result of forming a pattern, particularly of a spray from a nozzle.pattinsonizationThe process of pattinsonizing.pattipanAlternative form of pattypan.pattypanA pan used for baking patties.patulin(organic chemistry) A mycotoxin, 2-hydroxy-3,7-dioxabicyclo[4.3.0]nona-5,9-dien-8-one, produced by fungi associated with rotting fruit.paturonbasal segment of an arachnid chelicerapatxaranA reddish-brown sloe liqueur popular in parts of Spain.paucituberculatanAny marsupial of the order Paucituberculata; a shrew opossum.pauhagen(eastern US dialects) menhaden (fish)paukpanA bast fiber made from the flowering plant Aeschynomene aspera.pauldron(historical) A component of plate armor that protects the shoulder, generally covering more than a spaulder, also protecting the armpit and overlapping with other armor over the upper chest and back.paulin(US, nautical) A tarpaulin.pauperisationAlternative spelling of pauperization.pauperizationThe act or process of reducing to poverty.pausation(formal) A pause, or arrangement of pauses, as in poetry.pavanAlternative form of pavane (“musical style and dance”).pavenAlternative form of pavane.pavianAlternative form of pavane.pavilionAn ornate tent.pavillionAlternative spelling of pavilion (obsolete, except in the names of theatres, hotels, etc.)pavillonArchaic form of pavilion.pavinAlternative form of pavane.pavonA small triangular flag, especially one attached to a knight's lance; a pennon.pavonianOf or pertaining to the peacockpavoninin(biochemistry) A saponin used as a shark repellent.pawn(uncountable) The state of being held as security for a loan, or as a pledge.paxillin(biochemistry) A signal transduction adaptor proteinpaxillosidanAny sea star of the order Paxillosidapaydown(finance) The reissue of an unpaid debt for less than the initial issue.payetanAlternative form of paytan.payndemainA high-quality white bread, baked from the finest sifted flour, suitable for the lord of the manor.payrun(accounting) The periodic calculation of a payroll.paytanThe writer of a piyyut.pazufloxacin(pharmacology) A quinolone.pcpn(meteorology) Abbreviation of precipitation.peabrain(derogatory, informal) A stupid or clumsy person; a cretin.peacen(ambitransitive, rare, nonstandard) To make peaceful; calm; quietenpeachenOf or resembling a peach; peachlike; having a surface like that of a peach; peachy.peahenA female peafowl.peakon(physics, mathematics) A soliton whose first derivative is discontinuous.pean(heraldry) A heraldic fur of gold spots on a black field.pearlin(biochemistry) A protein found in nacrepearmainAny of various types of apple, having an elongated shape and often with streaky skin.peasantisation(UK) Alternative form of peasantization.peasantizationThe process of creating a peasant class involved in small-scale agrarian practices.peatmanA man whose occupation is digging peat.pecanA smooth, thin-shelled, edible oval nut of this tree.peccanAlternative form of pecan (tree).pecilocinAn antibiotic.peckhorn(music, slang) An alto horn or mellophone.pecksniffianAlternative letter-case form of Pecksniffian.pecoran(zoology) Any ungulate of the infraorder Pecorapecten(anatomy, obsolete) The bones in the hand between the wrist and the fingers.pectenaceanMisspelling of pectinacean.pectenotoxin(toxicology) Any of a class of cyclic polyether toxins, produced by dinoflagellates, associated with diarrhetic shellfish poisoningpectenoxanthin(organic chemistry) A particular carotenoid.pectin(biochemistry) A polysaccharide extracted from the cell walls of plants, especially of fruits; under acidic conditions it forms a gel. It is often used in processed foods, especially jellies and jams where it causes thickening (setting).pectinacean(zoology) Any of the Pectinacea, an obsolete suborder of mollusks now known as the superfamily Pectinoidea.pectinationThe state of being pectinated; that which is pectinated.pectizationThe process of pectizing.pectocinA bacteriocin related to Pectobacteriumpeculation(law, chiefly historical) The wrongful appropriation or embezzlement of shared or public property, usually by a person entrusted with the guardianship of that property.peculiarizationThe act or process of peculiarizing, or of making peculiar.pedalianRelating to the foot, or to a metrical foot; pedal.pedarian(Ancient Rome) One of a class eligible to the office of senator, but not yet chosen, who could sit and speak in the senate, but could not vote.pederin(organic chemistry) Any of a group of vesicant toxic amides present in beetles of the genus PaederuspedestalizationAct or process of pedestalizing.pedestrian(not comparable) Of or intended for those who are walking.pedestrianisation(British spelling) Alternative form of pedestrianization.pedestrianizationThe restriction of access to a street to pedestrians only.pediatrician(American spelling) A physician that specializes in pediatrics; the medical care of infants, children, adolescents, and young adults.pedication(uncommon, dated) Anal sex.pedicellationThe formation of a pedicel or peduncle.pediculation(medicine, dated) phthiriasispedinophyceanAny green alga of the class Pedinophyceae.pediocinAny of a class of bacteriocin from bacteria of the genus Pediococcuspedion(crystallography) An asymmetric triclinic crystal form that only has one face.pediplain(geology) A large plain formed in a desert by the coalescence of neighbouring pedimentspediplanation(geology) The formation of pediplains by coalescence of pedimentspedipulation(uncountable, rare) Dexterous manipulation of objects using the feet.pedocementation(geology) The process of forming a cementation from soil by the precipitation from groundwater of a crystalline matrix.pedon(soil science) A three-dimensional body of soil with dimensions large enough to permit the study of individual soil horizons.pedoturbationAny soil turbation that is not caused by illuviation.pedturbationAlternative form of pedoturbation.pedunculagin(organic chemistry) An ellagitannin found in pomegranates and walnuts, formed from casuarictin via the loss of a gallate group.pedunculationThe condition of being pedunculatepeebrainMisspelling of peabrain.peenThe (often spherical) end of the head of a hammer opposite the main hammering end.peerification(parenting) Treatment of one's child in a way considered more proper to an adult peer-to-peer relationship.peeververein(neologism, derogatory) People obsessed with upholding and enforcing the usage of "correct" English; militant prescriptivists.pefloxacin(pharmacology) A synthetic chemotherapeutic agent used to treat severe and life-threatening bacterial infections.pegacorn(informal) A horned Pegasus or a winged unicorn.peganA person who practices peganism, a variant of the vegan diet and paleo diet, with organic, unprocessed foods.pegcetacoplanA medication used to treat paroxysmal nocturnal hemoglobinuria.peginterferonA pegylated interferon.pegmatitizationAlternative form of pegmatization.pegmatizationThe process of pegmatizing.pehelwan(India) A wrestler.pehlevanAlternative form of pehlivan.pehlivanA Turkish wrestler in the sport of yağlı güreş (Turkish oil wrestling).pehlwanAlternative form of pehelwan.peinAlternative form of peen.pejorationThe act or process of becoming worse; worsening or degeneration.pejorativization(linguistics) The process by which a term gains a more negative connotation over time.pejvakin(biochemistry) A protein that regulates the function of hair cellspekanA fisher cat or fisher (Pekania pennanti, syn. Martes pennanti)pekaunObsolete spelling of pecan.pekilocerinA particular steroid glycoside.pelagian(archaic) Of or pertaining to the open sea.pelagiarian(rare) A member of the controversial fish clade, Pelagiaria, including the Acanthomorpha, Percomorpha, and certain potentially related extinct fishes.pelagophyceanAny marine alga of the class PelagophyceaepelanserinA serotonin antagonist.pelargonidinAn anthocyanidin, 2-(4-hydroxyphenyl)chromenylium-3,5,7-triol, found in geraniums and several soft berriespelargonin(organic chemistry) An anthocyanin that is a glucoside of pelargonidinpelecanArchaic form of pelican.pelerin(obsolete) A pilgrim.peletonMisspelling of peloton.pelicanAny of various seabirds of the family Pelecanidae, having a long bill with a distendable pouch.peliomycin(pharmacology) A particular cytotoxic agent.pellagrinOne who is afflicted with pellagra.pellamountainwild thyme (Thymus serpyllum)pelletisationAlternative form of pelletization.pelletizationThe act or process of pelletizing.pellucidin(organic chemistry) An antinociceptive present in Peperomia pellucidapelobatideanAny of the family Pelobatidae of toadspeloderanRelating to the caudal alae of a nematodepelorian(botany) Exhibiting peloria (abnormal regularity).pelorizationSynonym of pelorism.peloton(cycle racing) A group of riders formed during a cycling road race; especially, the main group of riders; the pack.pelretin(organic chemistry, pharmacology) A retinoid used in skincare creams to treat acne etc. or to reduce wrinkles.pelubiprofen(pharmacology) A nonsteroidal anti-inflammatory drug.pelycosaurian(zoology) Belonging to the Pelycosauria.pemicanAlternative spelling of pemmican.pemmicanA food made from meat which has been dried and beaten into a paste, mixed with berries and rendered fat, and shaped into little patties.pemmicanisationAlternative form of pemmicanization.pemmicanizationThe act or process of pemmicanizing.penAn enclosure (enclosed area) used to contain domesticated animals, especially sheep or cattle.penaeideanAny marine crustacean of the family Penaeidaepenaeidin(biochemistry) Any of a group of antimicrobial peptides, found in shrimps, that bind chitinpenaeoideanAny prawn of the superfamily PenaeoideapenalisationAlternative spelling of penalization.penalizationThe act of punishing; punishment.penamecillin(pharmacology) An acetoxymethyl ester of benzylpenicillin; a prodrug that is processed to benzylpenicillin by esterases.pencycuronA phenylurea fungicide with specific activity against the plant pathogen Rhizoctonia solani.pendidikan(Malaysia, informal, slang) Moral studies, a school subject for non-Muslim students in Malaysia that teaches about personal morality.pendimethalinThe herbicide 3,4-dimethyl-2,6-dinitro-N-pentan-3-yl-aniline.pendragonAlso capitalized as Pendragon: a title assumed by the ancient British chiefs when called to lead other chiefs: chief war leader, chieftain, dictator, despot or king.pendrin(biochemistry) A protein involved in the exchange of chloride and iodide ions across biological membranes.pendulationThe act of swinging like a pendulum, as of cargo being transported by cranependunculagin(organic chemistry) A particular ellagitannin.peneplain(geomorphology) A low-relief plain representing the final stage of fluvial erosion during times of extended tectonic stability.peneplanation(geology) The formation of a peneplain.penestonAlternative form of penistone.penetralianRelating to the penetralia.penetratin(biochemistry) A peptide, derived from a protein, that can penetrate a cell wallpenetrationThe act of penetrating something.pengolinArchaic form of pangolin.penguinA spiny bromeliad with egg-shaped fleshy fruit, Bromelia pinguin.penicillin(mycology) A blue mold of the genus Penicillium that produces penicillin.penillionplural of penillpenistonAlternative form of penistone.penjamin(slang) A dab pen (a battery-powered pen-shaped device that allows the user to inhale THC vapor).penmanA scribe, or a person who copies texts.penmenplural of penmanpennaraptoranAny member of the clade Pennaraptora, which includes birds and some of their extinct maniraptoran relatives.pennationThe presence of pennate featurespennatulacean(zoology) A member of the Pennatulacea; a sea pen.pennillionplural of pennillpenninervationThe quality of being penninerved.pennogeninA particular spirostanol glycosidepennonAny banner or flag.penorcon(music, historical) An old musical instrument of the cittern family, with nine pairs of strings.penperson(rare) A person with writing skills.pensionA sum paid to a clergyman in place of tithes.penstemon(botany) Any plant of the genus Penstemon, the beardtongues.pentaacetylation(organic chemistry) Modification by the addition of five acetyl groupspentacation(chemistry) A cation that has five positive chargespentachoron(mathematics) A four-dimensional object analogous to a tetrahedron, constructed out of five tetrahedra.pentacontagon(geometry) A 50-sided polygon.pentacontaheptachoron(mathematics) A four-dimensional polytope that has 57 cellspentacoordination(chemistry) The condition of being pentacoordinatepentacrinin(organic chemistry) A red and purple pigment found in certain crinoids of the genus Pentacrinus.pentacron(archaic, geometry) A solid with five summits (vertices), such as a square pyramidpentactinAlternative form of pentactine.pentacyclization(organic chemistry) Formation of a pentacyclic compound.pentadecagon(geometry) A polygon with fifteen sides.pentadecahedron(geometry) A polyhedron with fifteen faces.pentadecanoin(organic chemistry) Any glyceride of pentadecanoic acidpentadecathlonA sporting event consisting of fifteen different sports or contests.pentadinA sweet-tasting protein found in the climbing shrub Pentadiplandra brazzeana.pentadodecahedrona regular dodecahedron having twelve pentagonal facespentagastrinA synthetic polypeptide that has effects like gastrin when given parenterally.pentagon(geometry) A polygon with five sides and five angles.pentagonohedron(geometry) Any polyhedron that has pentagonal faces.pentahedron(geometry) A polyhedron with five faces.pentairon(chemistry, in combination) Five iron atoms or ions in a compound (Fe₅).pentakaidecahedronSynonym of pentadecahedron.pentalongin(organic chemistry, medicine) A pyranonaphthoquinone antibiotic isolated from the East African medicinal plant Pentas longiflorapentamerization(chemistry) The formation of a pentamer.pentamutation(genetics) A group of five mutationspentandrian(botany) Of or relating to the class Pentandria; having five stamens.pentaphyllon(obsolete) cinquefoilpentaphyrin(organic chemistry) A heterocycle that is a pentapyrrolic form of porphyrinpentapolitanRelating to a pentapolispentaporphyrin(organic chemistry) A complex of five porphyrin groupspentaquinAn 8-amino-quinoline derivative used to treat malaria.pentaspanSynonym of pentastarch.pentaspanin(biochemistry) A protein associated with integrinpentathlonAn ancient athletics discipline, featuring five events: stadion, wrestling, long jump, javelin and discuspentation(mathematics) The arithmetic operation of repeated tetration.pentaxinAlternative form of pentraxin.pentecontalitronA large gold coin of ancient Sicily worth fifty litraspentocinA particular bacteriocin produced by the bacterium Lactobacillus pentosus.pentonA pentagonal capsomere of an adenovirus capsid.pentosan(biochemistry) Any polysaccharide composed of pentoses.pentostatinA particular drug, isolated from Streptomyces antibioticus, used in chemotherapy.pentraxin(biochemistry) Any of a family of proteins characterised by calcium-dependent ligand binding.pentstemonAlternative form of penstemon.penturbanPertaining to or located in penturbia.penwomanA female writer.peonA lowly person; a peasant or serf; a labourer who is obliged to do menial work.peonidinAn anthocyanidin responsible for the purplish-red hue of the peony and other flowers.peoniflorinAlternative form of paeoniflorin.peoninArchaic form of paeonine.pepducin(biochemistry) A lipopeptide based on the intracellular loops of cell-surface receptorspeperinA volcanic tufa found in the Alban Hills near Rome.peplomycin(pharmacology) A bleomycin antibiotic.peppercornThe seeds of the pepper plant Piper nigrum, commonly used as a spice, usually ground or crushed.peppinArchaic form of pippin (“type of apple”).pepsin(biochemistry) A digestive enzyme that chemically digests, or breaks down, proteins into shorter chains of amino acids.pepsinizationTreatment with pepsinpepsinogen(biochemistry) A zymogen that is converted into pepsin by the hydrochloric acid in the stomach.pepstatin(organic chemistry) A hexapeptide (containing the unusual amino acid statine) that acts as a potent inhibitor of aspartyl proteasespeptidoglicanMisspelling of peptidoglycan.peptidoglycanA polymer of glycan and peptides found in bacterial cell wallspeptidorhamnomannanA peptidoglycan, containing rhamnose and mannose, that causes Dutch elm diseasepeptiglycanSynonym of peptidoglycan.peptisationAlternative spelling of peptizationpeptizationThe stabilization of a hydrophobic colloidal sol by the addition of an electrolyte that is adsorbed on the particle surfacespeptogen(physiology) Any substance convertible into peptone.peptoglycanAlternative form of peptidoglycan.peptonisationAlternative form of peptonization.peptonization(physiology, biochemistry) The conversion of a protein into peptones under the influence of the enzyme pepsinpeptotoxinA poisonous ptomaine found in peptones and in putrefying albuminous substances, such as fibrin, casein, brain, liver, and muscle.pequinA small, hot, citrusy and nutty chili pepper cultivar.peracetylation(organic chemistry) acetylation in which all available sites are acetylatedperaeonAlternative form of pereion.peragration(obsolete) The act or state of passing through any space.perambulation(law) An English legal ceremony in which an official from a town or parish walks around it to delineate and record its boundaries.peramelemorphianAny marsupial of the order Peramelemorphia; a bilby or a bandicoot.peramelianAny marsupial of the former order Peramelia (now Peramelemorphia)perathiepinA neuroleptic drug of the tricyclic family.peratizationThe renormalization of unrenormalizable field theories.percentilation(statistics) The division of a distribution into percentilesperceptionThe organisation, identification and interpretation of sensory information.perceptronan element, analogous to a neuron, of an artificial neural network consisting of one or more layers of artificial neuronsperceptualizationThe act of perceptualizing.perchlorinationThe act of perchlorinating.percolationThe seepage or filtration of a liquid through a porous substance.percolozoan(biology) Any unicellular organism of the phylum Percolozoa.percomorphaceanAny fish of the clade or subdivision Percomorphaceaepercontation(formal, rare or obsolete) an enquirypercussion(countable) The collision of two bodies in order to produce a sound.percyquinninA metabolite related to vibralactone, isolated from a fungus.perdeuterationdeuteration in which all (or all significant) hydrogen atoms are replaced with deuteriumperditionEternal damnation.perduellion(law, obsolete) treasonperduration(archaic) Long endurance or lastingness.peregrinObsolete form of peregrine.peregrination(countable, chiefly theology, archaic) A person's life regarded as a temporary stay on earth and a journey to the afterlife.pereionThe thorax of a crustacean, between the head (cephalon) and abdomen (pleon).peremption(law, obsolete) A quashing (of law, or a lawsuit)perennation(botany) The ability of an organism to survive from one germinating season to the next, especially under unfavourable conditions such as drought or winter.perennialization(agriculture) The conversion of a plant from an annual to a perennialperenniation(botany) The process or property of living for more than one year.pereonAlternative form of pereion.pererrationA rambling or wandering through various places.perfectationThe process or result of perfecting somethingperfectibilian(archaic) A perfectionist.perfectionA quality, endowment, or acquirement completely excellent; an ideal; faultlessness; especially, the divine attribute of complete excellence.perfectivization(grammar) The process of forming a perfective verb from the imperfective verbal stem.perfin(philately) A stamp marked with perforated initials.perflation(obsolete) The act of perflating, or blowing through.perfloxacin(organic chemistry) A particular quinolone antibiotic, 1-ethyl-6-fluoro-7-(4-methylpiperazin-1-yl)-4-oxo-quinoline-3-carboxylic acidperflubronperfluorooctyl bromide, a fluorochemicalperfluoroalkylation(organic chemistry) Any reaction that adds one or more perfluoroalkyl groups to a moleculeperfluoroarylation(organic chemistry) Any reaction in which one or more perfluoroaryl groups are added to a moleculeperfluorocarbon(organic chemistry) Any compound formally derived from a hydrocarbon by replacing each hydrogen atom with one of fluorine; used as refrigerants, solvents, and anesthetics.perfluorodecalin(organic chemistry) A perfluorocarbon, a derivative of decalin in which all of the hydrogen atoms are replaced by fluorine atoms.perflutrenA preparation of microspheres used as an ultrasound contrast agentperforationThe act of perforating or the state of being perforated.perforin(biochemistry) A cytolytic protein found in natural killer cells.perfrication(medicine, archaic) A thorough rubbing, as with an ointment or embrocation.perfrictionA severe chillperfringolysinAny of a group of toxic cytolysins produced by Clostridium perfringensperfusionThe act of perfusing, the passage of fluid through the circulatory system.perhalogenation(chemistry) The act or process of halogenating.periablationAlternative form of periablational.periareionThe point in an elliptical orbit around Mars that is closest to Mars.periareon(planetology) Alternative form of periareion.periastron(astronomy) That point of the orbit of a celestial body which is closest to the star around which the body is orbiting.periaxin(biochemistry) A structural protein that is required for the maintenance of myelinperibothron(astronomy) The point in an elliptical orbit around a black hole where the orbiting body is closest to the black hole.pericardianAlternative form of pericardial.pericardin(biochemistry) A protein, similar to collagen, that is involved in the morphogenesis of heart epithelium in some insectspericaryonMisspelling of perikaryon.pericentrin(biochemistry) A protein that binds to calmodulin and is expressed in the centrosome, an integral component of the pericentriolar material.perichelydianAny reptile of the clade Perichelydia.perichromatin(biology) Surrounding the chromatin of a cell nucleuspericlitation(obsolete) The state of being in peril.pericombobulation(humorous) Disturbance and confusion.periconceptionAround the time of conceptionpericondensation(organic chemistry) The condensation of neighbouring aromatic systems (often in the same molecule) typically to form a fused aromatic systempericynthionThe point in an elliptical orbit around the moon that passes closest to the moon.pericytherionPeriapsis around Venus.peridexionA legendary tree believed to grow in India that attracts doves and repels dragons.peridininA light-harvesting carotenoid, a pigment related to chlorophyll that appears in the peridinin-chlorophyll-protein (PCP) light-harvesting complex in dinoflagellates.peridomiciliationThe time surrounding domiciliationperiecianAlternative form of Perioecian.perienteron(medicine, obsolete) The primitive perivisceral cavity; the space between the entoderm and the ectoderm, the forerunner of the schizocoel or enterocoel.perifusion(medicine) fluid flow, especially that of a solution of drugs or a suspension of cells in a biological in vivo or in vitro system.perigalacticon(astronomy) The point in the orbit of a star at which it is closest to the centre of its local galaxyperigastrulation(physiology) Occurring around the time of gastrulationperigean(astronomy) Pertaining to the perigee.periglaciationGeomorphic processes resulting from seasonal thawing of snow in areas of permafrost, the runoff from which refreezes in ice wedges and other structures.perigon(geometry) A round angle; a full circle.perihelion(astronomy) The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun.perihermionPeriapsis around Mercury.periimplantationAround the time of implantationperiinfarctionSurrounding an infarction/infarct.perijunction(anatomy) Alternative form of perijunctional.perikarionMisspelling of perikaryon.perikaryonThe cell body of a neuron or of an odontoblast.perikron(rare) Alternative form of perikrone.perilesionAlternative form of perilesional.perilipinAny of a family of proteins that associate with the surface of lipid droplets, and whose phosphorylation is essential for the mobilization of fats in adipose tissue.perilithon(ecology) A form of periphyton found on submerged rocksperimenstruationperimenstrualperimetropolitanSurrounding a metropolisperimineralizationMisspelling of permineralization.perimycinA polyene antibiotic with antifungal properties, produced by the bacterium Streptomyces coelicolor var. aminophilus.perinigriconSynonym of peribothron (“periapsis of a black hole”).perintegration(linguistics) A secondary interpretation or analysis of the morphemic structure of a word, allowing its reinterpretation or a transfer of morphemic boundaries.periocclusionSurrounding an occlusionperiodisationAlternative form of periodization.periodizationThe process of categorizing something (e.g. history) into named periods.periodontopathogenA periodontal pathogenperiopathogenAny periopathogenic pathogenperiostin(biochemistry) A protein normally expressed during cardiac development but also re-expressed following injury to adult tissue.periovarianSurrounding the ovaryperiovulation(biology) The period of time around which ovulation occurs.perioxidationMisspelling of peroxidation.periparturitionAround the time of childbirthperipheralisation(British spelling) Alternative form of peripheralization.peripheralizationThe act of peripheralizing; marginalization.peripherin(biochemistry) An intermediate filament protein expressed mainly in neurons of the peripheral nervous systemperipherizationAlternative form of peripheralization.periphilin(biochemistry) Any of a family of proteins associated with the differentiation of skin cellsperiphyton(ecology) A mixture of algae, cyanobacteria, heterotrophic microbes, and detritus that is attached to submerged surfaces in most aquatic ecosystems.periplakinA protein that is a component of desmosomes and of the epidermal cornified envelope in keratinocytes.periplocinA particular steroid glycoside.periplocogeninA particular steroid glycoside.periplocymarinA particular steroid glycoside.periplogenin(organic chemistry) A cardenolide isolated from bael leaves.periposeidionPeriapsis around Neptune.peripylarianSurrounding the pylorusperiscian(now rare) Having the shadow moving all around.perisilvianMisspelling of perisylvian.perispomenon(linguistics, of a word) Having a high-low pitch accent on the last syllable.peristerion(botany) The herb vervain (Verbena officinalis).perisylvian(anatomy) Around the sylvian fissure in the cerebral cortexperitendon(anatomy) The membrane surrounding the tendon.peritenonThe connective tissue sheath surrounding a tendon.peritonealization(medicine) The process by which a surgical surface is covered with peritoneum, via surgical means or natural regeneration.peritransplantationSynonym of peritransplant.peritrophin(biochemistry) A protein located in the peritrophic matrix of insectsperiuranionPeriapsis around Uranus.periurbanAlternative spelling of peri-urban.periviscerokinin(biochemistry) Any of a family of neuropeptides present in some insectsperivitellinAlternative form of perivitelline.perken(ambitransitive, nonstandard) To make or become perked or perky.perkin(archaic) A kind of weak perry.perkinsozoan(protozoology, zoology) Any parasite of the superclass Perkinsozoaperlecan(biochemistry) A large multidomain proteoglycan that is a key component of the extracellular matrix of cartilage.perlectionthe reading through of something.perlemoen(South Africa) abaloneperlin(falconry) A cross breed of a peregrine falcon and a merlin.perlocution(linguistics) The effect the terms used by a speaker can have on another speaker and their emotions and responses.perlucin(biochemistry) A matrix protein, found in nacre, that nucleates growth of calcium carbonate crystalsperlustrationthe action or fact of perlustratingperlustrin(biochemistry) A protein found in the shell of abalonespermaban(Internet slang) A permanent ban on a user.permafrown(informal) A permanent frown.permafrozenpermanently frozenpermansion(obsolete, rare) Permanence.permastun(video games, rare) To permanently stun.permatan(colloquial) A perpetual tan.permatronA hot-cathode rectifier with anode current controlled by magnetic field.permavirgin(slang, derogatory) A person who is unlikely ever to have sex.permeabilisationAlternative spelling of permeabilization.permeabilizationthe act, process or result of making something, such as a membrane or cell wall, permeable - often through the use of surfactantspermeationThe movement of a fluid through a porous or permeable solid.permethrinA synthetic insecticide, C₂₁H₂₀Cl₂O₃, used to treat head lice, nits, and scabies; as an active ingredient in flea collars; and to eradicate woodworm infestations.permineralizationA form of fossilization in which minerals are deposited in the pores of bone and similar hard animal parts.permissionauthorisation; consent (especially formal consent from someone in authority)permitionMisspelling of permission.permixtionObsolete form of permission.permutahedronAlternative form of permutohedron.permutationOne of the ways something exists, or the ways a set of objects can be ordered.permutohedron(mathematics) A polytope with n-1 dimensions that is embedded in an n-dimensional space, its vertices formed by permuting the coordinates of the vector (1, 2, 3, ..., n).permuton(mathematics, physics) A probability measure Φ on the σ-algebra of Borel sets of the unit square [0,1]² such that Φ has uniform marginals (that is, Φ ([α, β] × [0,1]) = Φ ([0,1] × [α, β]) = β − α for every 0 ≤ α ≤ β ≤ 1).pernPart of a spinning wheel, a conical spool onto which the thread is wound from the spindle.pernicion(obsolete) destruction; perditionpernoctation(uncountable) The action of abiding through the night at a location; (countable) an instance of this; an overnight stay.perogenpierogis (type of dumpling)perogun(Caribbean) A kind of shrine to the orishas.peronosporaleanAny water mold of the order Peronosporalesperopsin(biochemistry) An opsin, found in the eye, that modulates vitamin AperorationA discourse or rhetorical argument in general.peroxidasin(biochemistry) A protein related to peroxidaseperoxidation(chemistry) Any oxidation reaction, especially of an oxide, that produces a peroxide.peroxidizationAct or process of peroxidizing.peroxidoredoxinAlternative form of peroxiredoxin.peroxidorexinMisspelling of peroxiredoxin.peroxidoxin(biochemistry) Any of a family of antioxidant proteinsperoxin(biochemistry) Any of a family of proteins, found in peroxisomes, that are associated with several peroxisomal disordersperoxinectin(biochemistry) A form of peroxidase, present in crayfish blood, that functions in cell adhesionperoxiporinA type of aquaporin that transports hydrogen peroxide across membranesperoxiredoxin(biochemistry) Any of a family of antioxidant enzymes that mediate signal transduction in mammalian cells.peroxydation(chemistry) Reaction with a peroxideperoxyflavin(biochemistry) Any peroxy derivative of a flavin, in general formed by the reaction of a reduced flavin with dioxygen molecules.peroxyredoxinAlternative form of peroxiredoxin.perpension(obsolete) Careful consideration; pondering.perpession(obsolete) suffering; enduranceperpetrationThe act of perpetratingperpetuationThe act of prolonging existence, of keeping something alive or active.perplectionRare spelling of perplexion.perplexation(rare) The state of being perplexed; perplexity.perplexionCondition or state of being perplexed; perplexity.perpotation(obsolete, rare) excessive drinking; boozingperquisitionA thorough inquiry or search.perron(architecture) A platform outside the raised entrance to a church or large building, or the steps leading to such a platform. US: stoop.perscriptionMisspelling of prescription.perscrutation(rare) A thorough searching; a minute inquiry or scrutiny.persecutionThe act of persecuting, especially a specific group of people; an instance of persecution.persephinA particular glial neurotrophic factorperseveration(psychology) The tendency to continue or repeat an act or activity after the cessation of the original stimulus.persicarin(organic chemistry) A flavonoid sulfate 4′,5,7-trihydroxy-3′-methoxy-4-oxoflav-2-en-3-yl hydrogen sulfatepersicaxanthin(organic chemistry) An organic compound found in peaches, plums, and related fruits.persimmonThe tree this fruit grows on, generally one of two species of ebony: Diospyros kaki (Asian) or Diospyros virginiana (North American).persimonObsolete spelling of persimmon.persinA fungicidal toxin present in the avocado.persipanA substance similar to marzipan, but produced from peach or apricot pits instead of almonds.personAn individual who has been granted personhood; usually a human being.personalisationNon-Oxford British English standard spelling of personalization.personalizationThe act of personalizing something, or adapting it for somebody's needs or tastes.personationThe act of personating: the playing of a role or portrayal of a characterpersonification(countable) A person, thing, or name typifying a certain quality or idea; an embodiment or exemplification.personizationpersonificationpersonnelman(US) Someone (of any gender) serving in the United States Navy.perspectioncontemplation; scrutinyperspectivalisationAlternative form of perspectivalization.perspectivalizationThe act of causing to become perspectival.perspectivation(discourse analysis) The assignment of a particular perspective to a narrative through the use of language.perspectivizationSynonym of perspectivation.perspirationThe action or process of perspiring.perstraction(chemistry) A separation process in which a solution is permeated through a membrane and subsequently extracted with a solventpersuasionAn argument or other statement intended to influence one's opinions or beliefs; a way of persuading someone.persulfidation(chemistry) reaction with a persulfidepersulfuration(organic chemistry) The addition of persulfide bondspersulphocyanogen(organic chemistry) thiocyanogenperswasionObsolete form of persuasion.pertactin(biochemistry) A highly immunogenic virulence factor of Bordetella pertussis, a bacterium that causes pertussis.pertain(intransitive) To belong to or be connected as a part, adjunct, attribute, or accessory.perthiocyanogen(organic chemistry) persulphocyanogenpertubationMisspelling of perturbation.pertuisan(historical) A kind of halberd or pike.perturbagenA substance (typically a peptide) designed to disrupt intracellular processes, providing information about the operation of pathways and networks within a cell.perturbation(uncountable) Agitation; the state of being perturbed.pertusarialeanAny fungus of the order PertusarialespertusionThe act of punching or piercing with a pointed instrument.perusitinA particular steroid glycoside.pervaporation(chemistry) A technique whereby the components of a mixture of two liquids are separated by selective permeation through a semipermeable membrane, the component that passes through the membrane being removed by evaporationpervasionThe act of pervading; permeation; suffusion.pervention(archaic) A coming or arrival; adventperversionThe action of perverting someone or something; humiliation; debasement.pervestigation(obsolete) thorough investigationpervigilation(obsolete, rare) Careful watching.pervulgation(obsolete) The act of publishing; publication.perytonA fictional creature having the head and forelegs of a stag and the wings and hindquarters of a bird.pescatarianAlternative form of pescetarian.pescetarianA person who consumes no animal flesh with the exception of fish or seafood.pescevegetarianAlternative spelling of pescovegetarian.pescovegetarianA person who does not eat meat, but accepts other animal products such as fish and seafoodpesenObsolete form of pisane.pesoizationThe process of pesoizing.pessimizationThe act or process of pessimizing, or making something worse.pestificationThe action, or the result of pestifying.petakelvin(metrology) An SI unit of temperature equal to 10¹⁵ kelvins. Symbol: PKpetalificationSynonym of petalody.petatonA measure of the strength of an explosion or a bomb based on how many quadrillion tons of TNT would be needed to produce the same energy.petechiation(pathology) The presence of petechiae on the skinpetemanSynonym of peterman (“safecracker”).petermenplural of petermanpetidoglycanMisspelling of peptidoglycan.petiotizationA wine-making process in which the marc from which the juice has been separated as usual by pressure is mixed with a solution of sugar and water, and the mixture again fermented, the second steeping containing, like the first, notable quantities of potassium bitartrate, tannic acid, etc.petitgrainAn essential oil that is extracted from the green twigs of the bitter orange plant.petition(law, by extension) A formal written application made to a magistrate or court for an order or a suit for divorce.petkinA little pet or darling.petractin(microbiology) An adhesin produced by Bordetella pertussis, the causative agent for whooping cough.petreanComposed of rock or stone; rocky, stony.petrifactionPetrification.petrification(figurative) obduracy; callousness.petrobactina particular photoreactive catecholate siderophore produced by the marine bacterium Marinobacter hydrocarbonoclasticuspetrocarbonCarbon that originated in petroleum hydrocarbons.petrofictionfiction that focuses on the oil industry as a major element.petrolizationThe treatment of water with kerosene in order to exterminate mosquitoes.petroyuan(neologism, usually in the plural) Money (in Chinese yuan) earned from the sale of oil.pettiloon(historical) An early form of trouser for women, loose-fitting and often gathered at the ankle; the trouser portion of a bloomer costume.pettywhin(archaic) The needle furze.petun(rare, chiefly historical) Tobacco, especially in the context of its early acquisition from Native Americans by the French.petunidinAn anthocyanidin responsible for the dark red or purple colour in many berries and flower petals.peucedanin(organic chemistry) A tasteless white crystalline substance extracted from the roots of the sulphurwort (Peucedanum), masterwort (Imperatoria), and related plants (tribe Selineae).pexigananA synthetic antimicrobial peptide developed for the treatment of infection in diabetics.pfaffianAlternative letter-case form of Pfaffian.phacoemulsification(surgery) A form of cataract surgery in which the eye's internal lens is emulsified with an ultrasonic handpiece and aspirated from the eye. Aspirated fluids are replaced with irrigation of balanced salt solution, thus maintaining the anterior chamber, as well as cooling the handpiece.phacofragmentation(surgery) fragmentation of the lens of the eye, typically after it has become dislocatedphacomulcificationMisspelling of phacoemulsification.phaelonionAlternative form of phelonion.phaenomenonArchaic spelling of phenomenon.phaeochromycin(organic chemistry) Any of a group of polyketides having a naphthalene group, based on 6-(4,5-dihydroxy-2-propylnaphthalen-1-yl)-4-hydroxypyran-2-onephaeodarianAny of the class Phaeodarea of radiolariansphaeomelaninAlternative spelling of pheomelanin.phaeophyceanAny member of the Phaeophyceae; a brown alga.phaeophytinAlternative form of pheophytin.phaeton(vehicles) a light four-wheeled open carriage drawn by four horsesphagnalonAny plant of the genus PhagnalonphagocytationThe act, or the result of phagocytizingphagodepressiondepression of the urge to feedphagomyxeanRelating to the phagomyxidsphagostimulationstimulation of the urge to feedphakininA protein associated with the lens of the eye.phakoemulsificationAlternative form of phacoemulsification.phalangian(anatomy, archaic) phalangealphalangidanAny arachnid of the order PhalangidaphalansterianOne who favours the system of phalansteries proposed by Charles Fourier.phallacidin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesphallacin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesphallation(biology, rare) Sexual intercourse by means of a penis.phallicizationThe process of making something phallic.phallin(organic chemistry, mycology) Any of several haemolytic cyclic oligopeptides present in the death cap toadstool, Amanita phalloides.phallisacin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesphallisin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesphalloidin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesphalloin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesphallolysin(organic chemistry) A toxic hemolysin found in the death cap mushroom, Amanita phalloides.phalloplasticianA surgeon who performs phalloplasty.phallotoxin(biochemistry) Any of several toxic cyclic peptides obtained from the mushroom Amanita phalloidesphaloidinMisspelling of phalloidin.phanAn ornamental tray with a pedestal, common in Thailand, Cambodia, and Laos.phanerogamianphanerogamicphaneron(philosophy) That which is perceived by the mind, regardless of whether it corresponds to reality.phanotronA kind of rectifier consisting of a thermionic gas tube.phantasmagorianSynonym of phantasmagoric.phantasmalian(obsolete, rare) Synonym of phantasmal.phantastikonA product of the imaginationphantastronAn electronic device that generates a series of pulsesphantomizationAct or process of phantomizing.pharaonArchaic form of pharaoh.pharbitin(organic chemistry) A glycoside present in seeds of the morning glory (of former genus Pharbitis (syn. of Ipomoea).pharbitisinAlternative form of pharbitin.pharisean(dated) Following the practice of Pharisees; pharisaic.pharmaceuticalisationAlternative form of pharmaceuticalization.pharmaceuticalizationConversion into a pharmaceuticalpharmacian(rare, archaic) Synonym of pharmacist: a person who sells medicines.pharmacometricianAn expert at pharmacometrics.pharmacomodulationThe modification of existing pharmaceuticals by replacing substituents etcpharmacon(very rare, formal) A medicine or drug.pharmaconutritionThe feeding of pharmaconutrientspharmacopolitanAlternative form of pharmacopole.pharmacosedationsedation by means of a pharmaceutical drugpharmacostimulationstimulation (typically of a lost function) by means of a pharmaceuticalpharmorubicinSynonym of epirubicin.pharyngalizationAlternative form of pharyngealization.pharyngealization(phonology) The act or process of pharyngealizing.phasedownA gradual reduction in size or scale.phaseolin(organic chemistry) A prenylated pterocarpan found in Phaseolus vulgaris seeds and in the stems of Erythrina subumbrans.phaseollidinA flavonoid found in Phaseolus vulgaris and other plants.phaseollinAlternative form of phaseolin.phaseolotoxin(toxicology) A toxin, produced by halo blight pathogen, that causes systemic chlorosis.phasin(biochemistry) Any of a family of surface proteins associated with bacterial granules.phasitronAn electromechanical device once used to modulate the phase of a signalphasmatodeanAny stick insect of the order Phasmatodeaphason(physics) A quasiparticle existing in quasicrystals due to their specific, quasiperiodic lattice structurephataginThe long-tailed pangolin (Manis tetradactyla).phebalosin(organic chemistry) A coumarin found in Phebalium species.pheganomycin(organic chemistry) A peptide antibiotic produced by Streptomyces cirratusphellamurin(organic chemistry) A flavanonol found in Phellodendron amurense; the 8-prenyl 7-glucoside derivative of aromadendrin.phellogen(botany) The tissue of young cells that produces the phellem.phellopterinA coumarin found in the plant Angelica archangelica.phelonion(Christianity) A liturgical vestment worn by a priest of the Eastern Christian tradition, equivalent to the chasuble of the Western tradition.phenacetinAny of a class of analgesic and antipyretic drugs derived from acetanilide.phenacetolin(chemistry, dated) A yellowish-brown powder obtained by the action of sulphuric acid on glacial acetic acid and phenol.phenalginAn ammoniated compound of phenyl and acetamide, used as an analgesic and antipyretic, and resembling phenacetin in its therapeutic action.phenanthropyran(organic chemistry) Any heterocycle consisting of a phenanthrene ring system fused to that of a pyranphenazonAlternative spelling of phenazone.phenethicillinAlternative form of pheneticillin.pheneticianSynonym of pheneticist.pheneticillin(pharmacology) A certain penicillin antibiotic.phenformin(pharmacology) An antidiabetic drug of the biguanide class.phenoconversionSynonym of phenocopying.phenogamianSynonym of phaenogamous.phenolizationTreatment with phenol.phenolphthalein(organic chemistry, pharmacology) A white or yellowish-white crystalline compound C₂₀H₁₄O₄ used in medicine as a laxative and in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids.phenolphthalin(organic chemistry) The colorless reduced form of phenolphthalein.phenolsulfonphthalein(biochemistry, organic chemistry) Phenol red, a pH indicator much used in cell biology.phenolsulphonphthaleinAlternative spelling of phenolsulfonphthalein.phenomenalizationThe process or result of phenomenalizing.phenomenonA thing or being, event or process, perceptible through senses; or a fact or occurrence thereof.phenomorphan(pharmacology) A particular narcotic painkiller.phenoseasonA phenological season.phenothrinA synthetic pyrethroid that kills adult fleas and ticks.phenotypisationAlternative form of phenotypization.phenotypizationThe determination of a phenotypephenoxymethylpenicillin(pharmacology) A crystalline nonhygroscopic acid that is a semisynthetic form of penicillin, used in the form of its sodium or potassium salt C₁₆H₁₇KN₂O₅S, and has antibacterial action similar to benzylpenicillin and is more resistant to inactivation by gastric acids; 6-phenoxyacetamidopenicillanic acid, C₁₇H₂₀N₂O₆S.phenoxypropylpenicillinA penicillin, C₁₈H₂₂N₂O₅S.phenprocoumonA long-acting oral anticoagulant drug, derived from coumarin, used for the prophylaxis and treatment of thromboembolic disorders.phenylahistinA cytotoxic metabolite produced by the fungus Aspergillus ustus.phenylalaninDated form of phenylalanine.phenylation(organic chemistry) Any reaction in which phenyl groups are added to a moleculephenylcoumarin(organic chemistry) Any phenyl derivative of a coumarinphenylfuran(organic chemistry) Any phenyl derivative of a furanphenylthiohydantoin(organic chemistry) Any phenyl derivative of a thiohydantoin, but especially one formed from an amino acid in the Edman method of protein degradationphenylurethanC₆H₅NHCOOC₂H₅, an aromatic crystalline ester usually made by adding ethyl alcohol to phenyl isocyanate.phenyracillin(pharmacology) A penicillin antibiotic.phenytoin(pharmacology) A synthetic compound related to hydantoin, used as an anticonvulsant in the treatment of epilepsy.pheomelaninA brown pigment produced by melanocytespheon(heraldry) A bearing representing the head of a dart or javelin, with long barbs which are engrailed on the inner edge.pheophytin(biochemistry) A chlorophyll from which the central magnesium atom has been removedpheranAlternative form of phiran.phicoerytrinMisspelling of phycoerythrin.philanthotoxinAny of a group of chemical components of the venom of the Egyptian solitary wasp, Philanthus triangulum.philanthropianSynonym of philanthropic.phillygenin(organic chemistry) A pearly crystalline substance obtained by the decomposition of phillyrin.phillyrin(organic chemistry) A glucoside extracted from species of Phillyrea as a bitter white crystalline substance, sometimes used as a febrifuge.philobiblian(obsolete) Fond of books; devoted to literature.philodendronAny of several climbing plants, of the genus Philodendron, native to America and the West Indies that are often grown as house plants.philologian(rare) A philologist.philoromanFriendly with Rome.philosophation(obsolete) philosophical speculation and discussionphilosophicationThe process of bringing something into the realm of philosophy.philosophizationProcess or action of philosophizing.philotherian(rare) A lover of animals.phiranA long cloak or robe worn by women and men in Kashmir.phisherman(computing, Internet) The criminal performing phishing attacks.phlebotomization(medicine) The process of phlebotomizing (performing phlebotomy).phlegmatizationThe act or process of phlegmatizing.phlegmonA solid mass formed by inflamed connective tissue, such as forms around an appendix in appendicitis.phleomycin(medicine) An antibiotic obtained from Streptomyces verticillatus.phlobatanninAny tannin related to or composed of phlobaphenesphlogistianA believer in the existence of phlogiston.phlogistication(chemistry, obsolete) The act or process of combining with phlogiston.phlogiston(chemistry, historical) The hypothetical fiery principle formerly assumed to be a necessary constituent of combustible bodies and to be given up by them in burning.phlogopitization(mineralogy) Conversion into phlogopite.phloretinThe phloroglucin ester of paraoxyhydratropic acid, found in the leaves of apple trees.phlorhizinAlternative form of phlorizin.phloridzinAlternative form of phlorizin.phlorin(organic chemistry) A glycoside of phloroglucinolphlorizin(organic chemistry) A glucoside of phloretin, phloretin-2'-β-D-glucopyranoside, found in unripe apples.phlorizinizationThe process of phlorizinizing.phloroglucin(organic chemistry, dated) phloroglucinolphlorotannin(organic chemistry) A form of tannin, found in brown algae, that is composed of oligomers of phloroglucinolphlyctenA phlyctenule.phobalysinA photobacterial lysinphobianOne who is phobic or antagonistic towards something.phoborhodopsin(biochemistry) A photoreceptor pigment used for negative phototaxis in halobacteriaphocacean(zoology) Any species of Phoca; seal.phocenin(organic chemistry) delphinephoenicoxanthin(organic chemistry) A particular carotenoid.phogrin(biochemistry) A protein present on insulin-secretory granules of pancreatic beta cellspholorotanninMisspelling of phlorotannin.phomazarin(organic chemistry) An aza-anthraquinone pigment isolated from the fungus PyrenochaetaphomopsinAny of a group of antimitotic mycotoxins present in fungi of the genus Phomopsis.phon(acoustics) A unit of apparent loudness, equal in number to the intensity in decibels of a 1,000-hertz tone judged to be as loud as the sound being measured.phonation(phonetics) The process of producing vocal sound by the vibration of the vocal folds that is in turn modified by the resonance of the vocal tract.phonemicizationThe act, process, or result of making a writing system phonemic.phonemisationNon-Oxford British English standard spelling of phonemization.phonemizationThe process of making or becoming phonemic.phoneticianA person who specializes in the physiology, acoustics, and perception of speech.phoneticizationThe process or result of phoneticizing.phonetizationThe art or process of representing sounds by phonetic signs.phoniatricianA practitioner of phoniatrics.phonoabsorptionthe absorption of soundphonologisationNon-Oxford British English standard spelling of phonologization.phonologization(phonetics) The development of a phonetic feature into a phonemic one.phonon(physics) The quantum of acoustic or vibrational energy (sound), considered a discrete particle rather than a wave.phonoreception(physiology) The perception of sound by animals through specialized sense organs; hearing.phonovisionAn early technique for recording a mechanical television signal onto gramophone records.phosdiphenA particular fungicide.phosducinThe gene that encodes this protein.phosgenation(inorganic chemistry, organic chemistry) Reaction with phosgene (or with triphosgene)phosphagen(biochemistry) Any of a class of energy storage compounds, chiefly found in muscular tissue in animals, allowing a high-energy phosphate pool to be maintained in a concentration range, which, if it all were ATP, would create problems due to the ATP consuming reactions in these tissues.phosphamidonA particular organophosphate insecticide, highly toxic to mammals.phosphatian(mineralogy) Containing phosphate anions.phosphatisationAlternative form of phosphatization.phosphatizationthe conversion of something into a phosphatephosphatonin(biochemistry) Any of a class of proteins that control phosphate homeostasisphosphepin(organic chemistry) A chemical substance with a seven-membered unsaturated ring molecule containing a phosphorus atom.phosphinObsolete form of phosphine.phosphinothricinThe herbicide (RS)-2-amino-4-[hydroxy(methyl)phosphinoyl]butyric acid.phosphinotricinAlternative form of phosphinothricin.phosphitylation(organic chemistry) The addition reaction of a phosphitephosphoacetylation(biochemistry) phosphorylation and acetylationphosphoactivation(biochemistry) activation by means of a phosphatephosphoanionAny phosphorylated anionphosphoantigen(immunology) Any of a class of non-peptidic antigens that are organic pyrophosphatesphosphocholinationReaction with phosphocholinephosphodestruction(biochemistry) The destruction of phosphorylated proteins, typically in cell wallsphosphodomain(biochemistry) A domain of a phosphoproteinphosphoglucan(organic chemistry) Any glucan that is associated with a phospholipidphosphoglycan(organic chemistry) Any glycan that is associated with a phospholipidphosphoglycerylation(organic chemistry) Reaction with phosphoglycerolphosphoglycoproteinAny phosphoglyceric glycoproteinphosphoglycosylation(organic chemistry) glycosylation that involves a phospholipidphosphoinactivation(biochemistry) inactivation by means of phosphorylationphosphoinhibition(biochemistry) inhibition of a biochemical process by means of phosphorylationphosphoinothricinMisspelling of phosphinothricin.phospholamban(biochemistry) A protein that regulates the Ca2+ pump in cardiac muscle and skeletal muscle cells.phospholambinMisspelling of phospholamban.phospholipoglycoprotein(biochemistry) A complex of a phospholipid and a glycoproteinphospholipomannan(biochemistry) A complex formed between a phospholipid and a mannanphospholipoprotein(biochemistry) Any lipoprotein in which the lipid is a phospholipidphosphomannan(biochemistry) A phosphosugar derived from mannanphosphomannoprotein(biochemistry) A glycoprotein containing phosphomannosephosphomodification(biochemistry) modification, typically of a protein, by phosphorylationphosphomutation(biochemistry) The formation of a phosphomutantphosphomycinAlternative form of fosfomycin.phosphonylation(organic chemistry) Any reaction that forms a phosphonatephosphopantetheinylationThe action, or the result of phosphopantetheinylatingphosphopeptidomannanA phosphomannan connected to a peptide via a phosphodiester linkphosphoprotein(biochemistry) any protein containing bound phosphate or complexed with a phospholipidphosphopurification(biochemistry) The separation and purification of phosphorylated protein from a mixturephosphoramidation(organic chemistry) Reaction with, or formation of a phosphoramidephosphoramidonA chemical compound derived from cultures of the bacterium Streptomyces tanashiensis, widely used as a biochemical tool.phosphoration(chemistry) Reaction with, or conversion into, a phosphoric acidphosphorecognition(immunology) immunological recognition of phosphorylated proteinsphosphoregulation(biology, biochemistry) regulation via phosphorylationphosphorian(mineralogy) Containing phosphorus (especially when this replaces another element).phosphoriboprotein(biochemistry) A riboprotein that has a bound phosphate groupphosphoribosylation(organic chemistry) reaction with a phosphoribosyl groupphosphorilationMisspelling of phosphorylation.phosphorizationAct or process of phosphorizing.phosphorothioationThe addition or transfer of a phosphorothioate groupphosphortungstenAn alloy, especially a specialist form of steel, that contains phosphorus and tungstenphosphorylation(biochemistry) the process of transferring a phosphate group from a donor to an acceptor; often catalysed by enzymes.phosphoscreenA phosphor screenphosphosphingomyelin(organic chemistry) Synonym of sphingomyelin or any related phosphosphingolipidphosphostainA phosphoprotein gel stainphosphotungsten(inorganic chemistry) phosphorus and tungsten linked together in phosphotungstates or similar ionsphosphovimentinphosphorylated vimentinphosphoylationMisspelling of phosphorylation.phosvitin(biochemistry) A yolk protein that is important in sequestering calcium, iron, and other cations.photoablation(surgery) The selective destruction of tissue by light, normally by means of a laserphotoabsorption(physics) A situation in which all of the energy of a photon is transferred to an atom or moleculephotoacclimation(biology) acclimation to a particular light environmentphotoaccumulation(biology) accumulation (of cells) in the presence of light (typically as part of a circadian rhythm)photoactivation(physics, chemistry) The absorption of energy from a photon in raising a molecule (or chromophore) from the ground state; especially the first stage of photosynthesis in which energy is absorbed by chlorophyllphotoadaptation(biology) adaptation of an organism to the changing amount of light in its environmentphotoaddition(chemistry) Any bimolecular addition reaction that takes place under the influence of lightphotoadsorption(physics, chemistry) An increase in the adsorption of a substance at an interface in the presence of light.photoallergenA substance that generates an allergic response in the presence of lightphotoammonificationphotochemical ammonificationphotoannulation(chemistry) photochemical annulationphotoantigen(immunology) A substance that produces an immune response in the presence of lightphotoaquation(chemistry, physics) photochemical aquationphotoassimilationThe process of photoassimilating.photoassociation(physics) The association of two atoms, under the influence of laser light, to form an excited diatomic molecule.photoattractionphotochemical attractionphotobiliprotein(biochemistry) Synonym of biliprotein.photobiomodulation(medicine) Any of several therapeutic techniques that employ low-level laser or LED light to relieve pain or to heal woundsphotobiostimulationbiostimulation by means of lightphotobiotin(organic chemistry) A photoactivatable derivative of biotin used in biochemical researchphotocarcinogenAny substance that becomes a carcinogen on exposure to light.photoception(physiology) The perception of lightphotochlorination(chemistry) photochemical chlorinationphotochromogenA microorganism (especially a mycobacterium) whose pigmentation develops following exposure to light.photocoagulation(medicine) A surgical procedure in which a tumour, or diseased retinal tissue, is destroyed by using a laser.photocompositionSynonym of phototypesetting.photocondensation(organic chemistry) photochemical condensationphotoconductionA change (normally an increase) in the electrical conductivity of a material as a result of incident electromagnetic radiationphotoconjugationphotochemical conjugationphotoconsumptionThe consumption of a chemical species (typically molecular oxygen) under the influence of lightphotoconvection(physics) convection under the influence of lightphotoconversion(chemistry, physics) photochemical conversionphotoconvulsion(pathology) A convulsion in response to a flickering lightphotocorrosioncorrosion by the action of lightphotocyclization(chemistry, physics) Any intramolecular photochemical process leading to a ring system by formation of one new single bond, either by a concerted process (e.g., electrocyclization) or by multi-step processes such as the Norrish-Yang reaction.photocycloaddition(chemistry) Any intermolecular photochemical process leading to a ring systems by formation of two new single bondsphotocyclodehydrogenationA photocatalytic cyclization and dehydrogenation for synthesizing polycyclic aromatic compounds.photocycloreversion(chemistry, physics) photochemical cycloreversionphotodarlingtonA Darlington amplifier having a phototransistor as inputphotodeactivationdeactivation by lightphotodecarbonylation(organic chemistry) Any photoinduced reaction that leads to the removal of a carbonyl group as carbon monoxidephotodecarboxylation(organic chemistry) Any photoinduced reaction that leads to the removal of a carboxyl group as carbon dioxidephotodecolouration(chemistry, physics) photochemical decolourationphotodecomposition(chemistry) Any photochemical reaction that results in the decomposition of a substancephotodeconjugation(chemistry) Any photoinduced reaction of a conjugated compound leading to loss of conjugationphotodegradationAny reduction or degradation in a useful property of a material because of a chemical change as a result of absorption of light.photodehydrogenationDehydrogenation that is caused or catalyzed by irradiation with light (electromagnetic radiation).photodepletiondepletion mediated by lightphotodepolarizationdepolarization on exposure to lightphotodesorption(physics, chemistry) An increase in the desorption of a substance from an interface in the presence of light.photodestructionphotobleachingphotodetection(physics) The detection of individual photons using a photodetectorphotodeterioration(chemistry) photodegradationphotodiffusionThe creation of a voltage across a conductor or semiconductor by illuminating one side of itphotodimerization(chemistry) Any photochemical dimerization reactionphotodisinfectiontopical disinfection by means of lightphotodisintegration(nuclear physics) Any nuclear reaction, especially a nuclear fission, initiated by absorption of high-energy electromagnetic radiation such as a gamma ray.photodisruption(surgery) The use of short bursts of laser light to disrupt tissuephotodissociation(chemistry) The dissociation of a molecule following the absorption of a photonphotodissolutionphotochemical dissolutionphotodistribution(pathology) The distribution of photosensitive damage to those areas of skin that receive the greatest exposure to sunlightphotodocumentationphotographic documentationphotoduplicationphotocopyingphotoelectron(physics) An electron ejected from the surface of a material by the photoelectric effect.photoelicitationThe elicitation of a response to the display of a photographic imagephotoelimination(chemistry, physics) photochemical eliminationphotoemission(physics) the ejection of electrons from the surface of a solid by incident electromagnetic radiationphotoemulsion(photography) photographic emulsionphotoencapsulationphotochemical encapsulationphotoenolization(chemistry) A form of phototautomerization leading to the production of enolsphotoentrain(physiology) To entrain a circadian rhythm by means of lightphotoevaporation(astronomy) The removal of the atmosphere of a planet or removal of a protoplanetary disk by high-energy photons from its sun or a nearby hot starphotoevolutionSynonym of photoemission.photoexcitation(chemistry) The formation of an excited state by the absorption of a photon.photofabricationA photographic method of manufacturing integrated circuits in which a pattern is placed over a semiconductor in an etching solution and exposed to lightphotofacilitationfacilitation (in any of several contexts) by means of lightphotofermentationfermentation that only proceeds in the presence of light; especially a process of producing hydrogen. Unlike biophotolysis in which hydrogen is produced from water, photofermentation produces hydrogen from organic substrates.photofission(nuclear physics) Nuclear fission as the result of the absorption of a gamma ray or other high-energy photon.photofragmentationThe formation of photofragmentsphotofrinSynonym of porfimer sodium.photofunctionalizationphotochemical functionalizationphotogain(physics) The gain (multiplication factor) of a photodetector or photomultiplierphotogelatingelatin, coated on a glass plate, that carries an image to be printed by the collotype processphotogen(chemistry) A light hydrocarbon oil resembling kerosene, used as a lubricant, illuminant, etc.photogeneration(physics) The generation of something (especially of electrical energy) by light.photoharden(transitive) To harden by exposure to light.photohydration(chemistry) Any photochemical reaction leading to the addition of water across a double or triple bond or to a carbonyl group etc.photohydrogen(biochemistry) hydrogen produced (along with oxygen) by the photolytic decomposition of water in certain anaerobic algae etcphotohyperpolarizationhyperpolarization by means of lightphotoidentificationThe identification using a photographphotoilluminationillumination by light, typically as part of a manufacturing processphotoimmobilizationimmobilization (of a surface) by means of lightphotoimmunosuppression(immunology) immunosuppression as a result of exposure to (typically ultraviolet) lightphotoinactivationinactivation by means of lightphotoincorporation(chemistry) photochemical incorporation (of a compound into an organism)photoinductioninduction as a result of irradiation by lightphotoinhibition(biochemistry) The inhibition of photosynthesis caused by protein damage due to high levels of light (especially ultraviolet)photoinitiation(chemistry, physics) The photoproduction of a radical or ion that is capable of initiating a chain reaction; used especially to initiate polymerizationphotointerpretationphotographic interpretationphotoion(chemistry) A cation produced through photoionizationphotoionisation(physics) The ejection of electrons from an atom or other species following the absorption of photons.photoionizationAlternative spelling of photoionisation.photoirradiationirradiation with lightphotoirritationirritation caused by exposure to lightphotoisomerisationAlternative spelling of photoisomerization.photoisomerization(chemistry) The formation of isomers via photoexcitationphotojunctionA nuclear battery in which a phosphor is irradiated by a radioactive material; a silicon junction converts the emitted light into electricity.photolesionA lesion formed by exposure to lightphotoliberation(biochemistry) liberation of a compound by the action of lightphotoligation(chemistry) Ligation triggered by light.photolocation(ichthyology) The ability to use light to locate objects in the environment.photomagnetization(physics) magnetization induced by lightphotomanipulationThe application of image-editing techniques to photographs in order to create an illusion or deception.photomarathonA photography competition in which participants must take a series of photographs of predetermined subjects in a limited time period.photomaton(obsolete) A photo booth.photomeson(physics) A meson (usually a p-meson) ejected from a nucleus by an impinging photonphotometricianSomeone dedicated to the scientific measurement of light.photomineralization(inorganic chemistry) photochemical mineralizationphotomodificationphotochemical modificationphotomodulationmodulation by means of lightphotomultiplicationThe process performed by a photomultiplier.photon(particle physics) The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson.photoneutron(nuclear physics) A free neutron produced by a photonuclear reactionphotooxidation(physics, chemistry) The loss of an electron from a photoexcited species.photooxygenation(chemistry) Any oxygenation reaction that takes place in the presence of light.photopatternAn etching produced by photopatterning.photoperceptionThe perception of light (by plants)photoperoxidationperoxidation catalysed by lightphotoperturbation(physics, chemistry) The disruption to the activity of a physical or chemical system by lightphotophosphorylation(biochemistry) photosynthetic phosphorylationphotopion(physics) A pion generated by the action of lightphotopolymerisationAlternative form of photopolymerization.photopolymerization(chemistry, physics) Any polymerization reaction that requires light for the propagation step.photoporation(cytology) The process of using light to create pores in a cell membranephotoprecipitationprecipitation caused by lightphotopreventionprevention (of some undesired effect) by means of a form of lightphotoproduction(chemistry) The production of a molecular species (e.g. a radical or ion) by means of lightphotoprotectionThe function, in plants that are adapted to high levels of sunlight, that protects the centres of photosynthesis from damage by excess light, normally by the use of carotenoid pigmentsphotoprotein(biochemistry) Any of several proteins that generate light when oxidized, normally without the aid of an enzyme catalystphotoproton(physics) Any proton produced in a photonuclear reactionphotoprotoporphyrin(biochemistry) A photoisomer of a protoporphyrinphotopsin(biochemistry) Any of a class of photoreceptor proteins present in the cones of the retina.photoreaction(chemistry) a photochemical reactionphotoreactivationreactivation by lightphotoreception(biology) The absorption of light energy by plants and animals, and its utilization for biologically important purposesphotorecombination(physics, chemistry) recombination influenced by lightphotoreduction(physics, chemistry) The addition of an electron to a photoexcited species.photorefractionA nonlinear optical effect seen in certain crystals and other materials that respond to light by altering their refractive index.photoregeneration(chemistry) photochemical regenerationphotoregulation(biochemistry) photochemical regulationphotorejuvenationA skin treatment that uses intense pulsed light or other thermal or chemical methods to treat some skin conditions and remove wrinkles arising from photoaging.photorelocation(biology) relocation (typically of chloroplasts) in response to lightphotorespiration(biology) Light-dependent release of carbon dioxide and uptake of oxygen in photosynthetic organisms as an unavoidable side reaction of photosynthesis.photoreversion(chemistry, physics) photochemical reversionphotorhodopsin(organic chemistry) The initial compound formed when rhodopsin is irradiated with light; it immediately produces bathorhodopsinphotosaturationphotochemical or photolytic saturation (a situation in which more light has no additional effect)photosedimentationOptical sedimentation.photoselection(physics, chemistry) A technique in which an aligned subset of sample molecules is selected by an exciting light beam.photosensationThe process of sensing light.photosensitisationAlternative form of photosensitization.photosensitizationThe acquisition of photosensitivityphotosimulation(photography) A photographic image that has been computer-modified to show a not-yet existing featurephotostabilizationphotochemical stabilizationphotosterilizationsterilization, typically of surgical instruments, by exposure to ultraviolet lightphotostimulation(biology, physics) The activation of a biological organ or organism by means of lightphotostimulon(biochemistry, genetics) photochemical stimulonphotostrictionA change in the dimensions of some piezoelectric materials when illuminated; only occurs if the material is also photoelectric.photosubstitution(chemistry, physics) Any photochemical substitution reactionphotosynchronization(biology) synchronization of a circadian rhythm by means of lightphotosynthetronA photosynthesis irradiance incubatorphototautomerization(organic chemistry) A form of photoisomerization leading to the formation of a tautomer.phototoxin(medicine, toxicology) Any toxin that causes an allergic reaction in the skin, developing into photosensitivity.phototransduction(biology) The process whereby the various bodies in the retina convert light into electrical signalsphototransfectiontransfection by means of a pulse of laser lightphototransformation(chemistry, physics) photochemical transformationphototriangulationtriangulation using photogrammetryphototrophinMisspelling of phototropin.phototropin(biochemistry) Any of a class of photoreceptor flavoproteins that mediate phototropism in higher plants.photowrittensimple past and past participle of photowritephourion(rare, historical) A fortified stronghold in the context of Ancient Greece.phragmalin(organic chemistry, biochemistry) A limonoid found in the Indian mahogany tree.phrasemanA phrasemonger.phrasemenplural of phrasemanphren(philosophy, historical) The brain or mind.phrenosin(biochemistry) A nitrogenous body that contains no phosphorus, related to cerebrin, supposed to exist in the brain.phrygianAlternative letter-case form of Phrygianphrynin(obsolete) bufotoxinphthalein(organic chemistry) Any of a range of lactones formed by the reaction of phenols with phthalic anhydride.phthalin(chemistry) A colourless crystalline substance obtained by reduction from phthalein, into which it is easily converted by oxidation.phthalocyaninAlternative form of phthalocyanine.phthalogenphthalocyaninephthaloylation(organic chemistry) Any addition reaction of a phthaloyl group.phthirapteran(entomology) Any member of the order Phthiraptera of lice.phun(leetspeak) Fun.phycobilin(biochemistry) Any of a group of bilins (pigments derived from porphyrins) found in some photosynthetic algae; they are open-chain tetrapyrroles related to mammalian bile pigments.phycobiliproteinAny of a class of water-soluble proteins, present in cyanobacteria and certain algae, that capture light energy which is then passed on to chlorophylls during photosynthesis; the most important constituents of the phycobilisomes.phycobillinAlternative form of phycobilin.phycobiloproteinMisspelling of phycobiliprotein.phycocyanin(biochemistry) A pigment from the light-harvesting phycobiliprotein family, along with allophycocyanin and phycoerythrin, an accessory pigment to chlorophyll.phycocyanobilinA blue phycobilin present in the phycobiliproteins allophycocyanin and phycocyanin, of which it is the terminal acceptor of energy.phycoerythinMisspelling of phycoerythrin.phycoerythrin(biochemistry) A red, light-harvesting protein found in cyanobacteria, red algae and cryptomonads.phycoerythrobilin(biochemistry) A red phycobilin found in the phycobiliprotein phycoerythrin, of which it is the terminal acceptor of energy.phycoerythrocyanin(biochemistry) A phycobiliprotein involved in photosynthesis, notably in Cyanobacteria and red algae.phycotoxinAny of many toxins produced by various forms of alga and seaweedphycourobilin(biochemistry) A tetrapyrrole orange molecule involved in photosynthesis in cyanobacteria and red algae.phycoxanthin(dated) A yellowish colouring matter found in certain algae.phylacogenAny of several bacterial derivatives developed by Dr. A. F. Schafer in 1910 to combat bacterial infections.phyllanemblinin(organic chemistry) A particular ellagitanninphyllanthocin(organic chemistry) The aglycon of the antileukemic glycoside phyllanthosidephyllochron(botany) The time interval between the sequential appearance of leaves on a plant (typically on a cereal)phyllocyanin(obsolete, organic chemistry) A blue pigment obtained by degradation of chlorophyll.phyllodulcin(organic chemistry) A compound found in the leaves of the Asian shrub Hydrangea serrata, which are used in herbal tea.phylloerythrinA derivative of chlorophyll produced in the body and associated with some forms of photosensitivity.phyllogen(botany) A protein inducer of leaf-like floral organs.phyllon(countable, especially botany, uncommon) A leaf, or something (flat) resembling a leaf.phyllophyllin(organic chemistry) A monocarboxylic acid derivative of chlorophyll.phylloseptin(biochemistry) Any of a group of antimicrobial peptides in the skin secretion of phyllomedusine frogsphylloxanthin(obsolete, organic chemistry) xanthophyll.phylloxeranAny of the plant-feeding insects of the family Phylloxeridae, closely related to aphids.phylloxinAn antibiotic peptide in the skin of tree frogs of the genus Phyllomedusa.phyloclassification(biology) phylogenic classificationphylon(biology, obsolete) All of the organisms descending from a given common ancestor, regarded as a race, tribe, vel sim.; a clade.phylopattern(genetics) A phylogenetic patternphylostratification(genetics, taxonomy) stratification by speciesphysagulinA particular steroid glycoside.physalaemin(biochemistry) A tachykinin peptide obtained from the Physalaemus frog.physalien(organic chemistry) A particular carotenoid.physalinA steroidal lactone found in Physalis species.physcion(organic chemistry) An organic compound found in some lichens.physicalizationThe act, process, or result of physicalizingphysicianA medical doctor trained in human medicine.physicomathematicianOne who studies physicomathematics.physioabsorptionAlternative form of physisorption.physioregulation(biochemistry) physiochemical regulationphysiosorptionAlternative form of physisorption.physisorption(physical chemistry) adsorption in which the forces involved are intermolecular rather than chemicalphysitianObsolete form of physician.phytoabsorption(biology) Absorption by plants.phytoaccumulation(biology) The accumulation, by a plant, of substances from its environmentphytoagglutinin(biochemistry) Any plant agglutininphytoalexin(medicine) any of several classes of antibiotics produced by plants in response to microorganismsphytoallexinAlternative form of phytoalexin.phytoanticipinAny pre-existing phytoalexin that interacts with a plant pathogen.phytoassociation(botany) association with plantsphytochelatin(biochemistry) A metal-binding polypeptide that is formed in some plants exposed to high levels of heavy metalsphytochelation(biochemistry) phytochemical chelationphytochlorin(organic chemistry) A tricarboxylic acid (17~{S},18~{S})-18-(2-carboxyethyl)-20-(carboxymethyl)-12-ethenyl-7-ethyl-3,8,13,17-tetramethyl-17,18,22,23-tetrahydroporphyrin-2-carboxylic acid derived from porphyrinphytochorion(biogeography) A geographic area with a relatively uniform composition of plant species.phytochromobilinA bilin chromophore found in phytochromephytocyanin(biochemistry) Any of a family of blue, copper-containing proteins present in many plantsphytocystatinAny cystatin found in plants.phytodegradation(biochemistry) The process by which substances taken by a plant from its environment are broken downphytodepurationThe purification of surface water by means of bacteria on the roots of plantsphytoerythrin(biochemistry) A red pigment obtained from certain lichenphytoestrogen(biochemistry) A substance found in certain plants (such as genistein) which can produce effects like that of the hormone estrogen when ingested into the body.phytoextractionA form of phytoremediation that exploits the process in which plants absorb substances, particularly heavy metals, from the environment and store them in their tissues.phytoferritin(biochemistry) An iron-protein complex found in plant chloroplasts; it is the plant version of ferritinphytoglucanAny glucan of plant originphytoglycogenA highly biocompatible polysaccharide extracted from plants, especially millet.phytohaemagglutininAlternative spelling of phytohemagglutinin.phytohaemoagglutininAlternative spelling of phytohemagglutinin.phytohemagglutinMisspelling of phytohemagglutinin.phytohemagglutinin(biochemistry) Any hemagglutinin (lectin) of plant origin, but especially that found in many beans that has a physiological actionphytohemaglutininMisspelling of phytohemagglutinin.phytomediationSynonym of phytoremediation.phytomelanAlternative form of phytomelanin.phytomelanin(botany) A hard, black material that forms a crust on the surface of some seedsphytomyxeanRelating to phytomyxidsphyton(botany) One of the parts which by their repetition make up a flowering plant, each being a single joint of a stem with its leaf or leaves.phytopathogen(biology) Any organism that is pathogenic to plantsphytoperiphytonperiphyton containing phytoplanktonphytophaganAny organism that eats plants.phytophthirianAny louse of the former division PhytophthiriaphytoplanktonPlankton, especially those small in size, that obtain energy by photosynthesis.phytoporphyrinSynonym of phylloerythrin.phytopreparationA preparation made from plant materialphytoprogestinA synthetic plant progestagenphytopromotion(biochemistry) An increase in the production of a phytochemical.phytoprotectionThe protection of plants from any outside destructive influencephytoprotein(biochemistry) Any plant proteinphytoremediation(biochemistry) Bioremediation through the use of plants.phytosanitationThe maintenance and verification of the health of plants, especially in terms of quarantine requirements.phytosaponin(biochemistry) A saponin obtained from a plantphytosaurianAny of the order †Phytosauria of extinct crocodilian-like archosauriforms or basal archosaurians from the Late Triassic.phytosorptionabsorption by plantsphytostabilisationAlternative form of phytostabilization.phytostabilizationThe long-term stabilization and containment of a pollutant by means of plants.phytostimulation(biology) A form of phytoremediation in which microbial activity near the roots is increasedphytotoxin(biochemistry) Any toxic substance produced by a plant.phytotransformation(biology) A form of phytoremediation in which plant's metabolism modifies its environment by inactivating, degrading or immobilizing substancesphytotron(biology) A laboratory in the form of a greenhouse or similar building in which plants can be grown and studied under individually controlled conditions.phytotropin(biochemistry) Any of a class of substances that inhibits auxin transport and therefore of root growth, gravitropism and phototropism.phytovolatilisationAlternative form of phytovolatilization.phytovolatilization(biology) A form of phytoremediation in which substances from the soil are released into the air, sometimes after being broken down into volatile componentsphytozoanAlternative form of phytozoon.phytozoon(zoology) A plant-like animal; a zoophyte.phytuberin(organic chemistry) A sesquiterpenoid lactone found in bacterially-rotted potato tuberspiaiman(Guyana) Synonym of piai.pian(medicine, archaic) Yaws.piation(obsolete) atonement or expiation.pibcornSynonym of pibgorn.pibgorn(music) A Welsh single-reed wind instrument or pipe with a horn at each end.picarian(zoology) Of or relating to the Picariae, an obsolete bird classification.picaridinSynonym of icaridin.picaroonA pirate or picaro.piccanin(South Africa, Australia) Alternative form of pickaninny.picein(organic chemistry) The glucoside of piceol.pickaroonArchaic form of picaroon.pickeroonObsolete form of picaroon.pickmanA man employed to break ground using a pick.pickwickianAlternative letter-case form of Pickwickian.picobarn(physics) A unit of surface area equal to 10⁻¹² barns.picocrocinMisspelling of picrocrocin.picoideanAny woodpecker of the genus Picoides.picoindentationpicoscale indentationpicoinjectionThe injection of a reagent into a microfluidic droppicokelvin(physics) A unit of temperature equal to 10⁻¹² of a kelvinpicolin(chemistry) Archaic form of picoline.piconA caramel-coloured flavoured bitters made from oranges, gentian, and quinquina, traditionally accompanying beer in the east and north of France.piconewton(metrology) An SI unit of force equal to 10⁻¹² newtons. Symbol: pNpicophytoplankton(biology) photosynthetic picoplanktonpicoplanktonThe plankton composed of cells between 0.2 and 2 micrometers.picoplatin(pharmacology) A platinum-based antineoplastic drug.picoradian(astronomy) A unit of solid angle equal to 10⁻¹² radianspicoxystrobinA particular strobilurin fungicide.picozoanAny unicellular eukaryote of the phylum Picozoapicrasmin(organic chemistry) An organic compound found in Jamaican quassia.picrocrocinA monoterpene glycoside precursor of safranal, responsible for the bitter taste of saffron.picrofuchsinA solution of fuchsin in picric acid, used as a stain for proteinspicropodophyllin(medicine) A particular chemokine that induces apoptosis in some tumour cellspicrotoxin(organic chemistry) A poisonous material, extracted from the seeds of plants of species Anamirta cocculus, used as a stimulant; it is a complex of two alkaloids: picrotoxinin and picrotin.picrotoxinin(organic chemistry) An alkaloid found in picrotoxin.pictorializationThe process or result of pictorializing.picturisationAlternative form of picturization.picturization(India) The setting or coordination of soundtrack music of a motion picture to events or choreography onscreenpidgeonArchaic spelling of pigeon.pidgin(linguistics) An amalgamation of two disparate languages, used by two populations having no common language as a lingua franca to communicate with each other, lacking formalized grammar and having a small, utilitarian vocabulary and no native speakers.pidginization(linguistics) The development of a pidgin language.piecakenA pie baked inside a cake.piecen(transitive) To join; piece (together); fay.piemanA man who sells pies.piemenplural of piemanpiericidinAny of a group of microbial hydroxypyridine antibiotics that associate with ubiquinone binding sitespierogenpierogis (type of dumpling)piewomanA woman who sells pies.piezoactuationactuation by mechanical pressurepiezophonon(physics) A phonon produced by mechanical stresspiezotranslationThe conversion of pressure into movement by a piezotranslator.pifithrinAny of a group of compounds that inhibit signalling and transcription activity in tumor suppression proteinspigdan(obsolete) A spittoon.pigeon(countable) One of several birds of the family Columbidae within the order Columbiformes.piggin(dialect) A small pail, can, or ladle with the handle on the side; a lading-can. In the colonial era, some buckets were made like a small barrel, but with one stave left extra long. This stave would be carved into a handle so the bucket could be used as an oversized scoop for scattering grain, slopping the hogs, etc.pigmaeanArchaic form of pygmean.pigmanA farm worker who looks after pigs.pigmeanArchaic form of pygmean.pigmentationColoration of human, plant or animal tissue, especially by pigment.pignorationThe act of pledging or pawning.pigpenSynonym of pigsty.pigskinThe skin of a pig.pigwidgeon(rare) A small or petty person, creature or object, especially a fairy, dwarf, imp, or elf.pikachurin(biochemistry) A dystroglycan-interacting polysaccharide which has an essential role in the precise interactions between the photoreceptor ribbon synapse and the bipolar dendrites.pikelin(UK, dialect) A light, thin cake or muffin; a pikelet.pikemanA soldier armed with a pike.pikemenplural of pikemanpiketoprofen(pharmacology) A nonsteroidal anti-inflammatory drug.pikromycinA particular macrolide antibioticpilcorn(UK, dialect) The naked oat.piliationA covering of hair-like pili.pilimictionThe passing of urine containing hair-like filaments.pilinAny of a class of fibrous proteins found in pilus structures in bacteriapillarisationAlternative form of pillarization.pillarizationThe act or process of pillarizing.pillionA pad behind the saddle of a horse for a second rider.pillorizationSynonym of pillorying.pilocarpinAlternative form of pilocarpine.piloerectionThe erection of hairs or papillae.pilomotionThe goose flesh reflex.pilon(Latin America) A conical loaf of sugar.pilosulinAny cytotoxic peptide in the venom of the ant Myrmecia pilosulapilotman(rail transport, UK) A railway employee who directs operations over a section of railway line temporarily reduced to single track, e.g. during maintenance work, or within an unsignalled area or over a line unfamiliar to the engine crew.pimaricinan antifungal drug used to treat ophthalmic infections, and as a food preservativepimavanserinAn experimental drug being developed to treat Parkinson's disease psychosis and schizophrenia.pimerization(organic chemistry) The formation of π-merspimobendanA veterinary medication used in the management of heart failure in dogs.pimolinA particular furanochromone.pimpinellin(organic chemistry) A furocoumarin found in Heracleum maximum and other plants.pinA small nail with a head and a sharp point.pinacolin(chemistry) A colourless oily liquid related to the ketones, and obtained by the decomposition of pinacone.pinakion(historical) An ancient pinax or tablet.pincoffin(archaic) A commercial preparation of garancin, yielding violet tints.pincushionThe names of various plants with flowers or other parts resembling a pincushion.pindanThe vegetation community and red soil associated with the south-western Kimberley region of Western Australia.pindown(UK) solitary confinement, formerly used as a method of punishment in children's homespingpeisaponinA particular steroid glycoside.pinguefactionA making of, or turning into, fat.pinguinObsolete form of penguin (“the bird, or the plant”).pingyangmycinAn antitumor glycopeptide antibiotic belonging to the bleomycin family, produced by Streptomyces verticillus var. pingyangensis.pinin(biochemistry) A protein associated with desmosomepinion(ornithology) The joint of a bird's wing farthest from the body.pinkeen(Ireland) A little fish; especially the minnow, Phoxinus phoxinus.pinken(intransitive) To become pink.pinkificationThe act or process of being made pink or being saturated with pink.pinmanOne whose job involves working with pins (any sense).pinnaglobin(organic chemistry) A manganese-containing porphyrin protein found in Pinna nobilis.pinnation(botany) The organisation of a pinnate leaf.pinnipedianSynonym of pinniped.pinobanksinAn antioxidant bioflavonoid found in sunflower honey.pinocembrinA flavanone found in damiana, honey, fingerroot, and propolis.pinonAlternative spelling of piñon.pinopsin(biochemistry) A type of opsin found in the pineal gland (mostly of chickens)pinoquercetin(organic chemistry) The flavone derivative 6-methylquercetin that is a plant metabolitepinostrobin(organic chemistry) The flavone (2~{S})-5-hydroxy-7-methoxy-2-phenyl-2,3-dihydrochromen-4-one that has antioxidant, antiinflammatory and anticancer propertiespinostrombinAlternative form of pinostrobin.pinosylvin(organic chemistry) A pre-infectious stilbenoid toxin, trans-3,5-dihydroxystilbenepinoxadenA particular pyrrazolooxadiazepine pesticidepinoxepin(pharmacology) An investigative neuroleptic drug.pinscreenA screen through which many closely spaces parallel pins have been inserted, used to make an impression of a three-dimensional object. Used as a novelty and in animated film entertainment.pintman(Ireland, informal) A man who habitually drinks pints of beer, or is revered for his way of drinking them.pinyinisationAlternative letter-case form of Pinyinisation.pinyinizationAlternative letter-case form of Pinyinization.pinyonAlternative spelling of piñon.pion(particle physics) Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks.pipemanA firefighter.piperacillin(pharmacology) A particular ureidopenicillin antibiotic.piperaduncinAny of a small group of antibacterial flavonones isolated from Piper aduncumpiperalinA particular fungicide.piperazinAlternative form of piperazine.piperinAlternative form of piperine.piperoxanAn antihistamine drug.pipkinA small earthen pot.pipobromanA particular drug used in the treatment of blood disorders.piposulfanA methanesulfonate with possible applications in treating leukemia.pippian(mathematics) A Cayleyan.pippinAny of several varieties of eating apple that have a yellow or green skin with patches of red.pipracillinAlternative form of piperacillin.piptocarphin(organic chemistry) Any of a group of sesquiterpenes present in PiptocarphapiragliatinAn enzyme inhibitor.pirarubicin(pharmacology) A particular drug used in chemotherapy.pirbenicillin(pharmacology) A penicillin antibiotic.pirlimycin(pharmacology) A lincosamide antimicrobial used to treat mastitis in cattle.pirnA cone-shaped spool or bobbin on which thread or yarn is wound, used most often for weaving.pirogenplural of pirogpirprofen(pharmacology) A nonsteroidal anti-inflammatory drug.pisanAlternative form of pisane.pisatinA pterocarpan found in the pea plant Pisum sativum.piscation(obsolete) fishing; fisherypiscatorianSynonym of piscatorial.piscetarian(rare) Alternative spelling of pescetarian.piscidin(biochemistry) Any of a group of antimicrobial peptides present in fishpissbrain(derogatory, slang, vulgar) A term of abuse.pistareen(now historical) A Spanish silver coin worth two reales, used as common currency in the Americas in the 18th century.pistillation(obsolete) The action of pounding with a pestle.piston(music) A valve device in some brass instruments for changing the pitchpistosaurianSynonym of pistosaurid.pitavastatin(organic chemistry, pharmacology) A particular statin drugpitchmanA salesman, especially one who aggressively markets wares from a street stall, or a carnival or side show act.pitchmenplural of pitchmanpitchpersonA pitchman or pitchwoman.pitchwomanA female pitchman; a saleswoman.pitchwomenplural of pitchwomanpitman(plural "pitmen") One who works in a pit, as in mining, in sawing timber, etc.pitmenplural of pitmanpiton(climbing) A spike, wedge, or peg that is driven into a rock or ice surface as a support (as for a mountain climber).pitpanA type of dugout canoe used in Central Americapitrilysin(biochemistry) A particular bacterial protease.pituitrinAn extract of bovine posterior pituitary hormones (i.e. oxytocin and vasopressin) formerly used in obstetrics to induce labour and to treat postpartum haemorrhage.pivampicillin(pharmacology) A pivaloyloxymethyl ester of ampicillin.pivotman(military) A pivot; the soldier around whom a body of troops wheels.pixelationA blocky effect caused by enlarging a bitmap so that individual pixels can be distinguished.pixelisationAlternative spelling of pixelization.pixelization(computing) The blurring of part of an image by setting groups of pixels that are close to each other to the same color.pixellationAlternative form of pixelation.pixilationA stop-motion technique where live actors are used as a frame-by-frame subject in an animated film, by repeatedly posing while one or more frame is taken and changing pose slightly before the next frame or frames.pixillationAlternative form of pixilation.pizotifenA benzocycloheptene-based drug used mainly to reduce the frequency of recurrent migraine.pizzamanA man who delivers pizzas.placationA process or act of placating; appeasement or an expression of appeasement.placazoanMisspelling of placozoan.placeman(UK politics, derogatory) One appointed to an office, especially in government, as a reward for political or other support; an appointee, a yes-man.placemenplural of placemanplacentalianHaving or relating to a placenta.placentarianMisspelling of placentalian.placentation(botany) The manner in which the seeds are attached to the placenta within the ovary locules.placewomanA female placeman.plackstrinMisspelling of pleckstrin.placodermian(zoology) Of, or relating to, prehistoric armoured fishes in the paraphyletic class Placodermi.placoidian(zoology, dated) A placoid fish.placozoan(zoology) Any of a group of balloon-shaped marine organisms, of the phylum Placozoa, considered to be the simplest living animals.plagiarisationSynonym of plagiarism.plagiarizationSynonym of plagiarism.plagiogrammaceanAny diatom of the family Plagiogrammaceaeplaiden(Scotland) A coarse, woollen clothplaidmanA man who wears a plaid.plain(now rare, regional) Flat, level.plainclothesmanA police officer (especially a detective) who wears civilian clothes when on duty.plainclothesmenplural of plainclothesmanplainclothesperson(rare) A police officer (especially a detective) of any gender who wears civilian clothes when on duty.plainclotheswomanA female police officer (especially a detective) who wears civilian clothes when on duty.plainfinUsed to describe various creatures with plain fins.plainsmanA native, inhabitant or settler of a plains region, but especially of the United States prairiesplainspokenSpeaking in a forthright manner.plainswomanThe female equivalent of a plainsman.plakin(biochemistry) Any protein that associates with junctional complexes and the cytoskeletonplakoglobin(biochemistry) A catenin protein that is a component of desmosomes.plakophilin(biochemistry) Any of a family of proteins, found in the cytoskeleton, that are essential for the formation and stabilization of desmosomal cell contacts.plaminogenMisspelling of plasminogen.planA set of intended actions, usually mutually related, through which one expects to achieve a goal.planarianAny of various flatworms of the order Tricladida living in marine, freshwater, or terrestrial environments.planarizationThe act or process of planarizing.planation(geology) The formation of a flat surface by erosion and depositionplanckon(physics) A Planck particle.planetarianAn inhabitant of a planetplanetman(science fiction, now rare) Someone from one's own planet.planification(nonstandard, non-native speakers' English) The process of planning.planigon(geometry) A convex polygon that can fill the plane with only copies of itself.planktocyclinA cyclooctapeptide protease inhibitor produced by the cyanobacterium Planktothrix rubescensplankton(uncountable) Organisms, especially small and microscopic ones, that drift in water.planosporicinA peptide lantibiotic produced by the actinomycete Planomonospora alba.plantainA plant in the genus Musa, the genus that includes banana, but with lower sugar content than banana.plantarflexionThe act of plantarflexing.plantaricinAny of a class of bacteriocins produced by the bacterium Lactobacillus plantarum.plantationA large farm; estate or area of land designated for agricultural growth. Often includes housing for the owner and workers.plantazolicinA natural antibiotic produced by the soil bacterium Bacillus amyloliquefaciens and active against anthrax.plantenObsolete spelling of plantain.plantkinA very small plant.plantsmanAn expert on the identification and cultivation of plants.plantsperson(uncommon) A plantsman or plantswoman.plantswomanA female plantsman.planulationThe formation of planulae, typically by some coralsplanulozoanAny animal of the proposed clade PlanulozoaplarnPlastic yarn made from strips of plastic bags.plasmalogen(organic chemistry) Any of a class of phospholipids, found in cell membranes, in which one of the fatty acids is replaced by an aldehyde (connected to the glycerol with an unsaturated ether linkage)plasmaron(physics) A quasiparticle arising in a system that has strong plasmon-electron interactions.plasmationThe act of forming or moulding.plasmatronA hot-cathode tube with controlled anode current.plasmepsin(biochemistry) Any of a class of aspartic acid protease enzymes produced by the plasmodium parasite.plasmiduction(biology) The cytoduction of plasmids.plasmin(biochemistry) A proteolytic enzyme that dissolves the fibrin in blood clots.plasminogen(biochemistry) The inactive precursor to plasmin; profibrinolysinplasmocinA reagent used to remove mycoplasmaplasmogen(biochemistry) The important living portion of protoplasm, considered a chemical substance of the highest elaboration.plasmolipin(biochemistry) A transmembrane plasma lipoproteinplasmologenMisspelling of plasmalogen.plasmolysationSynonym of plasmolysis.plasmon(physics, astronomy) The quantum of waves produced by the collective effects of large numbers of electrons when disturbed from equilibrium.plasmoredoxin(biochemistry) A redox protein associated with malarial parasitesplasposonA modular self-cloning minitransposonplasson(obsolete, cytology) A mass of undifferentiated anucleate protoplasm supposed to be the simplest structure of living organismsplasticianSomeone or something that transforms or reshapes objects.plasticin(biochemistry) A neurofilament protein present in the goldfish retinaplasticizationThe process of making something more plasticplastificationAct or process of plastifying.plastin(biology) A substance associated with nuclein in cell nuclei, and by some considered as the fundamental substance of the nucleus.plastination(anatomy) A technique for preserving bodies or body parts by replacing the water and fat with certain plastics.plastiskin(science fiction) synthetic skin, especially that of an android.plastochron(botany) The time between successive leaf initiation events.plastocyanin(biochemistry) An important copper-containing protein, involved in electron transferplastoglobulin(biochemistry) Any of a group of lipoproteins present in the plastids of many plantsplastron(zoology) The nearly flat part of the shell structure of a tortoise or other animal, similar in composition to the carapace.platan(now rare, literary) A planetree.platemanA person who produces plates for printing.platen(printing) The part of a printing press which presses the paper against the type and by which the impression is made.platencinA natural antibiotic, related to platensimycin, occurring in strains of Streptomyces platensis.platensimycin(organic chemistry, pharmacology) A natural antibiotic occurring in strains of Streptomyces platensis.plateosaurianAny sauropodomorph dinosaur of the clade Plateosauriaplateroon(slang, archaic) a counterfeit coin.platformization(Internet) The increasing domination of the Internet by a number of large companies whose products function as markets for content.platicon(physics) A flat-top dissipative solitonic pulseplatin(engineering) Alternative form of platen.platination(chemistry) Reaction with a platinate ionplatinian(mineralogy) Containing tetravalent platinum.platinisation(chiefly UK) Alternative form of platinization.platinizationthe process of coating (something) with platinum.platinoan(mineralogy) Containing divalent platinumplatitudinarianOne who uses many platitudes in speaking or writing.platoon(military) A unit of thirty to forty soldiers typically commanded by a lieutenant and forming part of a company.platten(transitive, glassmaking) To flatten and make into sheets or plates.platycoelian(archaic, zoology, anatomy) Synonym of platycoelous.platynotanAny anguimorph lizard of the clade PlatynotaplatyrhacidanAny millipede of the family PlatyrhacidaeplatyzoanAny protostome of the clade PlatyzoaplaudificationMisspelling of paludification.playathon(informal) An extended period of playing.playbarnA building containing indoor play equipment for children, such as slides and ball pits.playception(slang) A play that portrays actors staging a play or features an internal play; a play-within-a-play.playdown(sports) Any match that is part of a playoff.playgan(informal, derogatory) A person whose interest in paganism is shallow and lacking seriousness.playnObsolete spelling of plain.playpenAn enclosure in which babies or small children can play.pleaseman(obsolete) An officious fellow; a pickthank.pleasurization(rare) The act of pleasurizing.plebeanObsolete form of plebeian.plebeianA commoner, particularly (derogatory) a low, vulgar person.plebeianisationAlternative form of plebeianization.plebeianizationThe process of making something plebeian.plebianAlternative spelling of plebeian.plebificationMaking plebeian; vulgarizing.pleckstrin(biochemistry) A protein found in plateletsplecopteran(zoology) Any insect in the order Plecoptera, the stoneflies.plecotinAny of the tribe Plecotini of long-eared bats.plecstrinMisspelling of pleckstrin.plectasin(medicine) An antibiotic peptide isolated from the fungus Pseudoplectania nigrella.plectin(biochemistry) A very large protein that maintains the structural integrity of tissueplectotoxinAny toxin present in the venom of the spider Plectreurys tristisplectoxinA toxin present in the venom of spiders of the genus Plectreurysplectron(music) Alternative form of plectrum.pleionA region of positive departure from a norm.pleiotrophin(biochemistry) A protein, similar to midkine, that has a number of functions related to heparinplekton(physics) A theoretical elementary particle subject to braid statistics.plenolin(organic chemistry) A sesquiterpenoid lactone found in Helenium autumnale.pleonThe abdomen of a crustacean.pleosporaleanAny fungus of the order PleosporalespleotelsonA fusion of the last abdominal segment of an arthropod and its telsonplerion(astronomy) A nebula powered by the pulsar wind of a pulsar.plesiohedron(geometry) A special kind of space-filling polyhedron, defined as the Voronoi cell of a symmetric Delone set. Three-dimensional Euclidean space can be completely filled by copies of any one of these shapes, with no overlaps.plethron(historical units of measure) A former Greek unit of length equal to 100 Greek feet (podes).pleuralin(biochemistry) A cell wall protein present in diatoms of the genus CylindrothecapleurocapsaleanRelating to cyanobacteria of the order PleurocapsalespleurocidinA piscidin present in flounders of the genus Pleuronectes.pleurodiranAny turtle of the suborder PleurodirapleuromutilinAny of a class of antibacterial drugs that inhibit protein synthesis in bacteria by binding to a peptidyltransferase component within a ribosome.pleuron(zoology) A lateral sclerite of a thoracic segment of an arthropod between the tergum and the sternum.pleurosteon(archaic, ornithology, anatomy) The anterolateral piece which articulates the sternum of birds.pleurotolysin(biochemistry) A particular cytolysinpleuston(ecology) The organisms that live floating at the surface of water.plevin(obsolete, law) A warrant or assurance.plexciton(physics) A polaritonic mode that results from the strong coupling between excitons and plasmonsplexinAny of a group of transmembrane proteins which act to form receptors for semaphorinplextrinMisspelling of pleckstrin.plicaballinA particular plication in the molars of some Neogene mammals.plicamycin(pharmacology) An antibiotic C₅₂H₇₆O₂₄ with antineoplastic activity which is produced by three bacteria of the genus Streptomyces (Streptomyces argillaceus, Streptomyces tanashiensis, and Streptomyces plicatus), acts by inhibiting DNA transcription and replication, and is administered intravenously especially in the treatment of malignant tumors of the testes or in the treatment of hypercalcemia and hypercalciuria associated with advanced neoplastic disease.plication(now chiefly biology, geology) An act of folding.plinabulinAn experimental anticancer drug, a synthetic analog of phenylahistin.plinian(of a volcanic eruption) Descriptive of a style of volcanic eruption similar in character and in intensity to that of the AD 79 eruption of Vesuvius witnessed by Pliny the Younger.pliosaurianRelating to or characteristic of pliosaurs.pliotronA hard vacuum triode.plipastatin(organic chemistry) A lipopeptide antibiotic produced by Bacillus subtilis.plocinA particular steroid glycoside.plocozoanMisspelling of placozoan.plosion(phonetics) Pronunciation of a consonant that is characterised by completely blocking the flow of air through the mouth.plosivisationAlternative spelling of plosivization.plosivization(phonetics) The process of making or becoming plosive.ploughman(British) Alternative spelling of plowman.ploughmenplural of ploughmanploughpanA compacted layer of soil resulting from the use of ploughs or similar equipment.ploughperson(nonstandard, humorous) A person who operates a plough.ploughwoman(UK) Alternative spelling of plowwoman.ploutonion(historical) A sanctuary dedicated to the Ancient Greek and Roman god Pluto, usually at a location producing poisonous emissions, believed to represent an entrance to the underworld.plowmanA man who plows land with a plow.plowmenplural of plowmanplowpanAlternative form of ploughpan.plowwoman(US) A female plower, who plows land with a plow.pluginAlternative spelling of plug-in.pluginization(computing) The act or process of designing a system so that it can be extended with plug-ins.plumbagin(organic chemistry) The toxin 5-hydroxy-2-methyl-1,4-naphthoquinone.plumbeanSynonym of plumbeous.plumbian(mineralogy) Containing tetravalent lead.plumboan(mineralogy) Containing divalent lead.plumicorn(zoology, rare) An ear tuft of feathers, as in the horned owls.plumpen(transitive) To make plump; to fatten.plumpkin(colloquial, humorous) A fat person.plumularian(zoology) Any plumularia.pluperfectionThe quality or state of being more than perfect or complete.pluralisationAlternative spelling of pluralization.pluralizationThe act of making plural.plurinationA state containing large groups of people of different nationalities.plurisignificationThe property of having multiple meanings.plushen(chiefly poetic) Made of, or having the qualities of plush; (by extension) soft; velvetyplusquamperfectionUtter perfection.pluton(mineralogy) A body of igneous rock formed beneath the surface of the earth by consolidation of magmapluvian(dated) The crocodile birdpluviationThe raining of fine particles (typically sand) through the airplygainA Welsh custom of singing carols at dawn on Christmas morning.pneumatisationAlternative form of pneumatization.pneumatization(biology) The formation of air cavities, as in bones or a sinuspneumoallergenAn allergen in the lungs or respiratory tractpneumocandin(organic chemistry) Any of a group of echinocandins produced by several fungipneumocolon(medicine) A colonic diagnostic procedure during which the colon is inflated with air.pneumocyclicinA particular bacteriocin produced by the pneumococcus bacterium.pneumogalactan(biochemistry) A polysaccharide composed of pneumose and galactose residuespneumolancidinAny of a group of inhibitory lantibiotics produced by Streptococcus pneumoniae.pneumolysinA putative virulence factor of the gram-positive bacteria Streptococcus pneumoniae. It has a range of biological activity, including the ability to lyse and interfere with the function of cells and soluble molecules of the immune system.pneumoprotein(biochemistry) Any protein typically found in the fluid of the lungspneumoresection(surgery) Resection of part of a lung.pneumostimulationstimulation of the lungspneumotoxinAny pneumotoxic substance.pnicogenAlternative form of pnictogen.pnictogen(chemistry) Any element from group 15 of the periodic table, which includes nitrogen, phosphorus, arsenic, antimony and bismuth.pnigalion(historical) A nocturnal monster in Ancient Greece that would choke its victims; incubus; nightmare.poblacion(Philippines) A town center, or the barangay where one is located.pocanThe poke, Phytolacca americana (formerly Phytolacca decandra).pochonin(organic chemistry) A radicicol produced by Pochonia or Humicola.pocilloporinAny of a class of pigments present in pocilloporidspocosenAlternative form of pocosin.pocosin(US, ecology) A low, wooded swamp in (especially coastal) Eastern Maryland, Virginia or the Carolinas; a palustrine wetland with deep, acidic peat soils.pocosonAlternative form of pocosin.poculation(rare) Drinking of wine or other intoxicating liquor.podilfen(pharmacology) A vasodilator.podocalyxin(biochemistry) A sialoglycoprotein, one of the transmembrane sialomucins, thought to be the major constituent of the glycocalyx of podocytes.podocarpaceanAny conifer of the family Podocarpaceaepodocin(biochemistry) A protein which lines the podocytes and whose mutations can cause nephrotic syndromepodophyllin(organic chemistry) A resinous powder obtained by precipitating an alcoholic tincture of the rhizome of Podophyllum by means of water acidified with hydrochloric acid.podophyllotoxinA toxin obtained from the rhizomes of some South American plants that is the base of the anticancer drug etoposide.podoplanin(biochemistry) A particular glycoproteinpodsolizationAlternative form of podzolization.podzolisationAlternative form of podzolization.podzolizationThe process of podzolizing.poeticizationThe act or process of making poetic.poetizationThe act or process of making something poetic.pogamogganA Native American weapon consisting of a stone or piece of antler fastened to the end of a slender wooden handle.poghaden(eastern US dialects) menhaden (fish)pogonionThe furthest-forward part of the chin.pogonophoran(biology) Any marine, wormlike invertebrate of the phylum Pogonophora.pogromizationThe carrying out of a pogrom.pointen(rare, transitive) To make pointy or pointedpointmanAlternative form of point man.pointsman(rail transport, chiefly British) A man in charge of railroad points (switches).pointsmenplural of pointsmanpointspersonA person in charge of railroad points or switches.poioumenon(literature) A specific type of metafiction in which the story is about the process of creation (sometimes the creation of the story itself).poisonA substance that is harmful or lethal to a living organism when ingested.pokelokenAlternative form of pokelogan.pokeyman(humorous) Alternative letter-case form of Pokeyman.pokeymenplural of pokeymanpolarisationNon-Oxford British English standard spelling of polarization.polariton(physics) Any of a class of quasiparticles comprising elements of electromagnetic waves and excited states of matter.polarizationThe production or the condition of polarity.polaron(physics) The object (a quasiparticle) that results when an electron (or hole) in the conduction band of a crystalline insulator or semiconductor polarizes the lattice in its vicinity.polcalcin(biochemistry) A calcium-binding protein associated with chenopod pollinosispolderizationThe process of forming polders.polemanOne who propels a boat using a pole.polemicisationBritish standard spelling of polemicization.polemicizationThe composure of a polemic.polescreen(now historical) A screen mounted on a pole.polesmanSynonym of poleman (“one who propels a boat with a pole”).poleynRare form of poulaine (“(shoe with a) pointed toe”).policeman(law enforcement) A police officer, usually a male.policemenplural of policemanpolicepersonA police officer of any gender.policewoman(law enforcement) A female police officer.policewomenplural of policewomanpolicresulenA topical haemostatic and antiseptic, indicated for common anal disorders.policresulinAlternative form of policresulen.poligeenan(biochemistry) A degraded form of carrageenan.poliovirion(virology) An individual particle (virion)) of a polioviruspolisman(Scotland, Ireland) Policeman.politicalizationThe process or instance of making something political.politicianOne engaged in politics, especially an elected or appointed government official.politicisation(British spelling) Alternative spelling of politicization.politicization(politics) The state of being (or process of becoming) politicizedpolitisationpoliticizationpolititianObsolete form of politician.politizationThe act or process of politizing.politzerization(medicine) The inflation of the middle ear by blowing air up the nose during the act of swallowing.pollanA freshwater fish, Coregonus pollan, resembling a herringpollenA fine, granular substance produced in flowers.pollenationAlternative form of pollination.pollenin(organic chemistry) A substance found in the pollen of certain plants.pollicisationAlternative form of pollicization.pollicitationA voluntary engagement, or a paper containing it; a promise.pollicizationA plastic surgery technique in which a thumb is created from an existing finger, typically by migrating the index finger to the position of the thumb.pollination(botany) The transfer of pollen from an anther to a stigma; effected by insects, birds, bats and the wind etc.pollman(UK, historical, Cambridge University slang) One who takes an ordinary university degree, without honours.pollotarianA person who consumes no animal flesh with the exception of chicken or other poultry such as turkey.pollusionObsolete form of pollution.pollutician(derogatory) A politician who supports policies and initiatives that result in environmental damage.pollutionSomething that pollutes; a pollutant.poloxinThe kinase inhibitor 2-methyl-5-(1-methylethyl)-1-[O-(2-methylbenzoyl)oxime]-2,5-cyclohexadiene-1,4-dionepolronObsolete form of pauldron.poltron(obsolete) Alternative form of poltroon.poltroonAn ignoble or total coward; a dastard; a mean-spirited wretch.polyacron(archaic, geometry) A polyhedron.polyaddiction(medicine) The condition of having more than one addiction.polyaddition(chemistry) Any addition reaction that yields a polymer.polyadelphianArchaic form of polyadelphous.polyadenylation(biochemistry) The formation of a polyadenylate, especially that of a nucleic acid.polyadenylylation(biochemistry) Addition of many adenylyl groupspolyagglutinationagglutination (of red blood cells) by many forms of blood serumpolyalkylation(organic chemistry) alkylation with many alkyl groupspolyalphaolefina non-polar polymer; made by the polymerization of the alpha-olefin monomerpolyamidation(chemistry) Any reaction that yields a polyamidepolyamination(organic chemistry) The introduction of many amine groups into a moleculepolyandrian(botany) Dated form of polyandrous.polyandrionA mass grave or communal tomb.polyanion(chemistry) Any anion having more than one negative charge.polyaxon(zoology) In a sponge, a spicule that has more than four centered axes.polybaramin(creationism) A grouping of organisms that belong to different holobaramins.polycalin(biochemistry) A lipocalin associated with the silkworm (of genus Bombyx)polycarbon(inorganic chemistry) polymeric carbon (such as graphite or graphene)polycation(chemistry) any cation having more than one positive chargepolychaetanRelating to polychaetespolychitin(biochemistry) A polymer of chitinpolychoron(geometry) A four-dimensional polytope.polychronizationThe process of becoming polychronic.polycistron(genetics) A group of mRNAs expressed from a single transcription unitpolycondensation(chemistry) Any condensation reaction, of a monomer having two functional groups, which leads to the formation of a polymer (a polycondensate).polycottonA fabric made from a blend of cotton and artificial fibres, especially of polyester fibrespolycotyledon(botany) A plant that has many, or more than two, cotyledons in the seed.polycresulinMisspelling of policresulin.polycyclization(organic chemistry) Any cyclization reaction in which many rings are formedpolycystin(biochemistry) Any of a group of glycoproteins, mutation of which is implicated in polycystic kidney disease.polydalin(organic chemistry) A particular melampolide.polydatinSynonym of piceid.polydispersionThe process of making or becoming polydispersepolydnavirionThe virion of a polydnaviruspolydodecahedronconvex regular 4-polytype (four-dimensional analogue of a Platonic solid) with Schläfli symbol {5,3,3}polydolopimorphianAny extinct metatherian of the order †PolydolopimorphiapolydomainComposed of multiple (crystal) domainspolyedronDated form of polyhedron.polyesterification(chemistry) Any reaction which generates a polyesterpolyethoxylation(organic chemistry) Reaction with multiple instances of ethylene oxidepolyfectiontransfection mediated by cationic polymerspolyferredoxina polymeric form of ferredoxinpolyfluoroolefin(chemistry) Any of several polymers made from the polymerization of fluorinated olefinspolyfragmentationThe condition of being polyfragmented.polyfructan(biochemistry) A polymeric fructanpolyfructosan(biochemistry) A form of fructanpolyfunctionalization(organic chemistry) The addition of many different functional groups to a moleculepolygalactanA relatively large molecular weight galactanpolygalactinA biodegradable polymer used to make surgical suturespolygalacturonan(biochemistry) A polymeric form of galacturonanpolygalin(obsolete, chemistry) polygalic acidpolygamian(botany) Polygamous.polygastrian(zoology, obsolete) One of the Polygastrica, an obsolete classification of microorganisms.polyglactin(surgery) Any of a range of polymeric materials derived from glycolic acid that are used as a suturepolyglucan(biochemistry) Any polysaccharide containing glucan unitspolyglucosan(biochemistry) A polymeric form of glucosanpolyglutamationThe addition of multiple glutamic acid residues to a molecule through an enzymatic process. An example of this is the attachment of glutamic acid residues to folic acid.polyglutamylation(biochemistry) The posttranslational modification of a protein (especially a tubulin) by the addition of glutamate to existing glutamate residuespolyglycan(biochemistry) A polymeric form of a glycanpolyglyphanodontianAny extinct lizard of the clade †Polyglyphanodontiapolygon(geometry) A plane figure bounded by edges that are all straight lines.polygonationA method of surveying, an extension of triangulation, in which a set of contiguous polygons are measured and plottedpolygonbodenpolygonal patches of ground, found especially in frozen environments.polygonization(mathematics) The subdivision of a plane into polygonspolygynA plant of the order Polygynia.polygynian(botany) Having many styles; belonging to the order Polygynia.polyhalogenation(chemistry) The process of making something polyhalogenated.polyhedrin(biochemistry) A protein that forms the crystalline matrix of viral polyhedral bodiespolyhedron(geometry) A solid figure with many flat faces and straight edges.polyhistorianSynonym of polyhistor.polyhydramnionAlternative form of polyhydramnios.polyhydrocarbon(organic chemistry) Any polymeric hydrocarbonpolyinstantiation(computing) Instantiation into multiple independent instances.polyinstanton(physics) That involves multiple instantonspolyion(chemistry) any multiply charged ion; a polycation or polyanion.polykaryon(cytology) A multinuclear cellpolyketomycinA tetracyclic quinone glycoside produced by Streptomycespolyligation(chemistry) ligation to two or more atomspolymatin(organic chemistry) Any of a group of melampolides found in Polymnia species.polymedicationMedication (typically self-medication) with many different drugspolymelianAn animal or person that has polymeliapolymerinA humic acid-like polymer found in olive mill wastewaters.polymerisation(British spelling, chemistry) Alternative spelling of polymerization.polymerization(organic chemistry) The chemical process, normally with the aid of a catalyst, to form a polymer by bonding together multiple identical units (monomers).polymixinAlternative spelling of polymyxin.polymorphean(rare) polymorphouspolymyarianOf or pertaining to the nematode worms that have many longitudinal rows of muscle cells.polymyodianOf or pertaining to the songbirdspolymyxinAny of several toxic antibiotics, derived from the soil bacterium Bacillus polymyxa, used to treat infections by gram-negative bacteriapolynandrian(obsolete) polyandrouspolyneddylation(biochemistry) Multiple neddylationpolyneopteranAny insect of the subdivision Polyneoptera.polynitrogen(inorganic chemistry) Any of several unstable allotropes of nitrogen that have more than two atoms in each moleculepolynoxylinAn antiseptic that is a polymer of urea and formaldehyde.polyolefin(chemistry) A polymer (such as polyethylene) made by the polymerization of an olefin.polyopisthocotyleanAny monogenean flatworm of the subclass PolyopisthocotyleapolyovulationThe production of multiple ova in each ovulationpolyoxin(biochemistry) Any of a group of nucleoside antibiotics, produced by Streptomyces bacteria, composed of heterocyclic moieties derived from amino sugars; the simplest being 1-β-(5'-amino5'-deoxy-D-allofuranuronosyl)-5-hydroxy-methyluracilpolyoxoanion(inorganic chemistry) Any of several complex polymeric oxoanions, especially those of larger transition elementspolypean(zoology) Of or relating to a polyp or polyps.polyperythrin(obsolete, biochemistry) hematoporphyrinpolyphagan(zoology) Any member of the beetle suborder Polyphaga.polyphemusinAn antimicrobial peptide present in the horseshoe crab Limulus polyphemuspolyphloesboean(poetic, rare) Alternative form of polyphloisbic.polyphonA wooden-cased music box of a kind typically manufactured in Germany.polyphyllin(organic chemistry, medicine) Any of a class of saponins, isolated from the herb Paris polyphylla, that has anticancer activitypolypianRelating to a polyppolypiarian(obsolete) Of or pertaining to the hydroid cnidarians of class Polypiaria.polypin(UK, brewing) A plastic version of the kind of brewery cask called a pin (equal to half a firkin), popular in homebrewing and the off-trade (deliveries for home consumption).polyplacophoranOf or pertaining to the molluscs of the class Polyplacophora.polyploidisationAlternative form of polyploidization.polyploidization(genetics) hybridization that leads to polyploidypolypodasaponinA particular steroid glycoside.polypomedusanA cnidarian of the former order Polypomedusaepolypragmon(rare) A busybody or troublemaker or someone who looks only to their own concerns.polyprotein(biochemistry) Any protein (especially ones produced by viruses) that cleave to produce a number of polypeptides, some of which act as hormonespolyptoton(rhetoric) A stylistic scheme in which words from the same root are used together, or a word is repeated in a different inflection or case.polyrattanA synthetic resin-based material resembling rattan.polyreaction(chemistry) A polymerization or polycondensation reactionpolyresinAny synthetic polymeric resinpolysatin(textiles) polyester satinpolysectarianComposed of many sects.polysensitizationsensitization to multiple allergenspolysialylationConversion to, or reaction with, polysialic acid.polysilicon(chemistry) Containing many silicon atoms, especially when linked into chains or networks.polyspaston(historical) A hoisting-tackle with many pulleys.polysulfation(chemistry) reaction with many sulfate groupspolysyndeton(rhetoric) The use of many conjunctions to achieve an overwhelming effect in a sentence.polytan(geometry) A polyabolo.polytechnicianSomeone who is studying or has studied at a polytechnic school, especially in France.polytechnizationThe practice, typically in communist states, of prioritizing technical and industrial aspects of educationpolytenation(molecular biology) Conversion into polytenespolytenizationThe formation of polytenespolytetrahedronA uniform convex polychoron made up of 600 tetrahedral cells; a hexacosichoron.polytetrahydrofuran(organic chemistry) A polymer derived from the ring-opening of tetrahydrofuran.polyton(mathematics) An ordered set of singletonspolytopian(rare) Someone who visits many places.polytrichonA European moss, great golden maidenhair or great goldilocks, Polytrichum communepolytronA homogenizer, especially one manufactured by Polytron.polyubiquitin(biochemistry) A chain of several ubiquitin molecules attached to a protein.polyubiquitination(biochemistry) The addition of a series of ubiquitin molecules to another protein.polyubiquitinylationAlternative form of polyubiquitination.polyubiquitylationpolyubiquitinationpolyunsaturation(chemistry) The state of being polyunsaturated, or the degree to which something is polyunsaturated.polyuridylationThe addition of many uridine nucleotides to RNApolyuridylylation(biochemistry) uridylylation at many sitespolyzoan(zoology, obsolete) bryozoanpolyzoon(obsolete) A bryozoan.polyzwitterion(organic chemistry) Any polymer in which the monomers are zwitterionspomeranianAlternative letter-case form of Pomeranian (dog)pomeridian(rare) Of or pertaining to the afternoon.pomeron(physics) A Regge trajectory postulated in 1961 to explain the slowly rising cross section of hadronic collisions at high energies.pomiferinA flavonoid pigment found in the horseapple.pompillion(obsolete) An ointment or pomatum made of black poplar buds.pompionAlternative form of pumpion.pompkinObsolete spelling of pumpkin.pompoleon(obsolete) A pomelo, or grapefruit.pomponA hardy garden chrysanthemum with button-like flower heads.pompoonObsolete form of pompom.pon(Japanese mahjong) A call for forming a set of three identical tiles using a discarded tile.pondhornAny unionid of the genus Uniomeruspondian(linguistics) Pertaining to differences between English as spoken in the United Kingdom and the United States and or Canada.pondiminSynonym of fenfluramine.poneratoxinA paralyzing neurotoxic peptide isolated from the venom of the bullet ant.ponericinAny of a group of peptides, related to ricin, in the venom of the ant Pachycondyla goeldiiponkanA sweet, round citrus fruit which is a hybrid of a mandarin and a pomelo (Citrus poonensis).pontificationThe act of pontificatingpontificianOf or relating to the pontiff or pope.pontin(biochemistry) An ATPase that is a component of telomerasepontonArchaic form of pontoon.pontoonA flat-bottomed boat or other floating structure used as a buoyant support for a temporary bridge, dock or landing stage.ponyskinThe skin of a pony.pookaun(Ireland) A kind of small fishing boat from the region of Galway in Ireland.pookawnAlternative form of pookaun.pookhaunAlternative form of pookaun.poonAny of several East Indian trees of the genus Calophyllum, yielding a light, hard wood used for masts, spars, etc.poopskin(ethnic slur, derogatory, offensive) A person with dark-coloured skin.popcorn(countable) A serving of popcorn.popgunAlternative form of pop gun.poplinA fabric of many varieties, usually made of silk and worsted; used especially for women's dresses.popularisationNon-Oxford British English standard spelling of popularizationpopularizationThe act of making something popular to the general public.populationThe people living within a political or geographical boundary.populin(organic chemistry) A glycoside, related to salicin, found in the bark of certain species of the poplar (Populus).poquosonAlternative form of pocosin.poration(biology) The formation of pores in a surface, or the pattern of such pores.porcelain(usually uncountable) Synonym of china: porcelain tableware.porcelainizationThe act or process of porcelainizing.porfiromycin(pharmacology) An antineoplastic antibiotic, [(4S,6S,7R,8S)-11-amino-7-methoxy-5,12-dimethyl-10,13-dioxo-2,5-diazatetracyclo[7.4.0.02,7.04,6]trideca-1(9),11-dien-8-yl]methyl carbamate.poriferan(zoology) Any sponge of the phylum Porifera.porin(biochemistry) Any of a class of proteins that cross cellular membranes and act as pores through which small molecules can diffuseporion(anatomy) The point on the human skull located at the upper margin of each ear canal, and underlying the tragus.porkmana person who produces and sells pork.porn(uncountable, informal) Pornography.pornificationConversion to the style or level of pornography.pornoaction(Indonesia, law) Any actions, behaviors, or forms of dress considered immoral in public due to sexual mores.pornographisationAlternative form of pornographization.pornographizationThe process of making something pornographic.pornotopianOf or relating to pornotopia.porntoon(Internet slang) A pornographic cartoon.porogenAny of a mass of particles, of a specified shape and size, used to make pores in moulded structures used for tissue engineering (they are dissolved away after the structure has set)porosificationThe process of making or becoming porous.porphin(organic chemistry) A ring or four pyrrole rings linked by methine groups; it is the structure at the centre of hemoglobin, chlorophyll and other porphyrinsporphobilinogenA pyrrole involved in porphyrin metabolism, generated by aminolevulinate and the enzyme ALA dehydratase.porphyranA sulfated carbohydrate derived from red algae of the genus Porphyra.porphyrin(organic chemistry) Any of a class of heterocyclic compounds containing pyrrole rings arranged in a square or other similar shape; they are important in biochemistry in a form with a metal atom in the central cavity (hemoglobin with iron, chlorophyll with magnesium, etc.).porphyrinogen(biochemistry) A reduced form of porphyrin that is an intermediate in the biosynthesis of hemeporphyrizationThe act of porphyrizing, or the state of being porphyrized.porphyropsinAny of a group of purple carotenoid pigments, similar to rhodopsin, in the retinas of some fishporrection(archaic) The act of stretching forth, or holding forward, as if offering.porronA glass container for wine for table use, with a long neck at the top for filling and holding and a long thin spout at the side to enable pouring into the mouth from a distanceportabilizationThe process of making something portable.portacabinA prefabricated hut that is transportable, often used as an office or for storage.portajohn(informal) A portable restroom.portalization(Internet) Conversion into a portal.portation(computing) The act of porting software between hardware or operating system platforms.portcrayonObsolete form of porte-crayon.portensionThe act of foreshowing; foreboding.portionAn allocated amount.portmanA burgess of a port, especially of one of the Cinque Ports.portolan(historical, nautical) A chart of European navigable waters based on descriptions of coasts.portscan(networking, transitive) To scan (a network host) in order to detect open ports.portulanAlternative form of portolan.posatirelin(pharmacology) A thyrotropin-releasing hormone analogue.posedown(bodybuilding) The final part of a competition in which two or more bodybuilders pose freestyle on stage side by side, rather than individually.posessionMisspelling of possession.poshen(ambitransitive, UK) To make or become posh, to posh upposhteenAlternative form of posteen (“sheepskin cloak”).poshtinAlternative form of posteen (“sheepskin cloak”).positionA place or location.positivizationThe act, or the result of positivizingpositon(physics) A positron, especially when compared with a negatonpositron(particle physics) The antimatter equivalent of an electron, having the same mass but a positive charge.posken(Judaism) To make an official ruling or decision.possemanA male member of a posse.possesionMisspelling of possession.possessionA control or occupancy of something for which one does not necessarily have private property rights.possewomanA female member of a posse.postabdomen(zoology) The part of a crustacean behind the cephalothorax.postablationFollowing ablationpostabortionAfter abortion (termination of pregnancy).postacceleration(physics) acceleration of an electron following deflection by a magnetic fieldpostacquisitionFollowing acquisitionpostactivationFollowing activationpostadaptationFollowing adaptationpostadjudicationAfter adjudication.postadministrationFollowing administration of a drugpostadmissionOccurring after admissionpostadoptionAfter adoption.postadsorptionFollowing adsorptionpostalveolarization(phonology) A sound change whereby a sound becomes postalveolar.postamplificationFollowing amplificationpostamputationAfter an amputation.postapplicationFollowing an applicationpostathon(Internet, slang) A period in which many messages are posted (as to an Internet newsgroup or forum).postauctionAfter an auction.postauthorizationAfter authorization.postbifurcationFollowing bifurcationpostbronchodilationFollowing bronchodilationpostcampaignAfter a political campaign.postcanon(religion) Postdating the development of a religious canon.postcaptainAlternative form of post-captain.postcardioversionAfter cardioversion.postcastrationFollowing castrationpostcatheterisationAlternative form of post-catheterization.postcatheterizationAlternative form of post-catheterization.postcellularizationFollowing cellularizationpostcementation(dentistry) After cementation.postcentrifugationAfter centrifugationpostcesareanFollowing a Caesarean section.postcessationAfter something has ceased.postchaperonin(biochemistry) Following modification by a chaperoninpostchlorinationThe addition of chlorine to the treated water right before it is distributed.postcircumcisionFollowing circumcision.postcivilizationAfter civilization.postcognition(parapsychology) retrocognitionpostcollisionAfter collision.postcollusionAfter collusion.postcolumn(chemistry) Describing any process carried out on the materials leaving a chromatography columnpostcombustionFollowing combustionpostcommunionThe concluding portion of the communion service.postcompetitionOccurring after a competition.postcompletionAfter completion.postconceptionFollowing conception.postconcussionOccurring after, or as a consequence of, a concussionpostcondition(programming) A condition that must be met immediately after execution of some piece of code.postconstructionOccurring after construction.postconsultationAfter consultation.postconventionAfter a convention.postconversionAfter conversion.postconvictionOccurring after a judicial conviction.postcoordinationcoordination following some other operationpostcopulationFollowing copulation.postcorrelationHappening after correlationpostcrystallisationAlternative form of post-crystallization.postcrystallizationAlternative form of post-crystallization.postdawnAfter dawn; especially, within a few hours after.postdefectionAfter defection.postdepositionOccurring after deposition.postdepressionAfter an economic depression.postdeprivationAfter a period of deprivation.postdevaluationAfter a financial devaluation.postdictionThe construction of past conditions by relying on the presentpostdigestionAfter digestion.postdilatationdilatation following another procedurepostdilation(surgery) dilation (of a blood vessel) following some other operationpostdilutionFollowing dilutionpostdiluvianpostdiluvialpostdisseisinSynonym of redisseizin.postdistributionAfter a distribution.postdomesticationFollowing domesticationpostdonationAfter, or following a donation.posteclosion(biology) Following eclosionposteenA sheepskin cloak.postejectionAfter ejection.postelectionOccurring after an election.postelectroporationFollowing electroporationpostemancipation(US) After the Emancipation Proclamation.postembolisationAlternative form of postembolization.postembolizationAfter embolization.postemigrationAfter emigration.postenvenomationAfter envenomation.posterchildrenplural of posterchildposteriomedianposterior and medianposteriorisationAlternative form of posteriorization.posteriorization(biology) The acquisition of posterior values, especially the formation of the forebrain, midbrain, hindbrain and spinal cord from the anterior neural plateposterisationAlternative form of posterization.posterizationThe act or process of posterizing.posternSituated at the rear; posterior.posterodorsomedianAlternative form of posterodorsomedial.posteromedianBoth central and posteriorposteruptionAfter a volcanic eruption.postestimationestimation following some other processpostestrogenizationFollowing estrogenizationpostexcisionAfter excision.postexcretionFollowing excretionpostexecutionAfter execution (the government-sanctioned killing of a criminal).postexilianAfter an exile, especially the Biblical exile of the Jews.postexpansionAfter expansion.postexpirationAfter expiration.postextensionFollowing extensionpostextractionAfter extraction (of e.g. a tooth).postextubationFollowing extubationpostfermentationFollowing fermentationpostfertilisationAlternative form of postfertilization.postfertilizationAfter fertilization.postfiltrationAfter filtration.postfinalizationAfter the finalization of an adoption, at the point of legal transfer of parental rights and withdrawal of supervision.postflexion(zoology) After the flexion stage of larval development.postformalinFollowing treatment with formalinpostformationAfter formation (of a business, an anatomical structure, etc.).postfortificationFollowing fortificationpostfulgurationFollowing fulgurationpostfunctionalization(organic chemistry) The addition of a functional group after the body of a compound has been synthesizedpostfusionFollowing fusionpostgastrulationAfter gastrulationpostgelationOccurring after gelationpostgermination(botany) Occurring after germinationpostgraduation(followed by noun) After graduation; the time after graduation.postherniationAfter herniation.posthornAlternative form of post horn.posthospitalizationOccurring after hospitalization.posthumanSucceeding human beings as presently defined; more than, or beyond, what is human.posthumiliationAfter humiliation.posthybridizationFollowing hybridizationposthydrationFollowing hydrationpostilionA rider mounted on the near (left) leading horse who guides the team pulling a carriage.postillationThe act of postillating; exposition of Scripture in preaching.postillionAlternative spelling of postilion.postilluminationFollowing illuminationpostimmersionFollowing immersion in water (with the danger of drowning)postimmigrationAfter immigration.postimmunisationAlternative form of postimmunization.postimmunizationAfter immunization.postimplantationFollowing implantation.postimplementationAfter implementation.postimputationFollowing imputationpostinAlternative form of posteen.postinclusionAfter inclusion.postincubationAfter incubation.postindianA Native American.postinductionFollowing inductionpostindustrializationThe period marked by decline in industrialization and a social movement from blue-collar to white-collar jobs.postinfarctionAfter infarction.postinfection(medicine) Occurring after an infectionpostinfestationFollowing infestation.postinfiltrationFollowing infiltrationpostinformation(psychology, sociology) After the receipt of information.postinfusionFollowing infusion using a catheterpostingestionAfter ingestion.postinitiationOccurring after initiationpostinjection(medicine) After an injection is administeredpostinoculationFollowing inoculationpostinseminationFollowing inseminationpostinsertionAfter insertion.postinspectionAfter inspection.postinstructionAfter being instructed or taught.postinstrumentationFollowing instrumentationpostintegrationOccurring after integrationpostinternalizationFollowing internalizationpostinterventionAfter intervention.postintoxicationAfter intoxication.postintroductionAfter the introduction of something.postintubationAfter intubation.postinvasionFollowing an invasion.postirradiationAfter irradiation.postisolationOccurring after a period of isolation.postlapsarianPertaining to anything which follows a lapse or failure.postlegislationAfter the introduction of legislation.postlesionAfter a lesion.postliberationAfter liberation.postligationFollowing ligationpostlitigationAfter litigation.postlockdownAfter a lockdown.postman(England, historical) One of the two most experienced barristers in the Court of Exchequer, who have precedence in motions, so called from the place where he sits, the other of the two being the tubman.postmanipulationFollowing manipulationpostmarathonafter a marathonpostmatriculationAfter matriculation.postmaturationAfter maturation.postmedian(anatomy) posterior to the medianpostmedicationAfter medication.postmenplural of postmanpostmeridianof or pertaining to the afternoonpostmicturitionAfter micturition.postmigrationAfter migration.postmillenarianOne who believes in postmillennialism.postmineralizationAfter a mineralization.postmodern(literally) Relating to what follows the modern era.postmodernisationAlternative spelling of postmodernization.postmodernizationThe act or process of postmodernizing.postmodification(grammar) modification by a postmodifierpostmonsoonAfter a monsoonpostmultiplicationThe process of postmultiplying.postneurulationFollowing neurulationpostnoun(grammar) Following a noun.postnucleationFollowing nucleation.postobservationAfter observation.postocclusionFollowing formation of an occlusionpostoperationAfter an operation.postordinationAfter ordination.postosmication(cytology) postfixation of a biological sample using osmium tetroxidepostovipositionAfter oviposition.postovulationAlternative form of post-ovulation.postpaganAfter the decline of paganism.postpartisan(US politics) Moving past and beyond conventional partisan dividespostparturitionFollowing childbirthpostperfusion(medicine) After perfusion.postperson(uncommon) A letter carrier of any gender.postphosphorylationFollowing phosphorylationpostpollinationAfter pollination.postpolymerizationDescribing any reaction or treatment of a polymer that takes place following polymerization.postposition(grammar) A word that has the same purpose as a preposition but comes after the noun.postpostmodernHaving the characteristics of a movement or style (of art, architecture, literature, science, or philosophy) that has moved beyond postmodernism.postprecipitation(chemistry) The precipitation of a second (often related) substance upon the surface of an initial precipitatepostpredictionFollowing a predictionpostprenylationFollowing prenylation.postpresentationAfter presentationpostprisonAfter release from prison.postproductionAlternative spelling of post-production.postprogression(pathology) Following progression (of a disease)postpromotionAfter a promotion.postpublicationOccurring after publication.postpupationFollowing pupationpostqualificationAfter a qualification being awarded.postradiationAfter radiation.postradioembolizationAfter radioembolization; applied to a syndrome characterised by nausea, fatigue, etc.postrandomizationFollowing randomizationpostransfectionMisspelling of posttransfection.postratificationFollowing ratification.postreactionFollowing a reactionpostreactivationFollowing reactivationpostrecessionOccurring after a recession.postreduction(medicine) After reduction (realignment of a fracture, etc.).postregulationFollowing regulationpostrehabilitationFollowing rehabilitationpostrejectionAfter rejection.postremissionAfter remission of a disease.postreperfusionAfter reperfusion.postreplication(genetics, biology) Used, attributively, to describe the period following replication of nucleic acidpostrepolarizationFollowing repolarizationpostresectionAfter resection.postresurrectionAfter resurrection.postresuscitationAfter resuscitation.postretractionFollowing retraction of an article for publicationpostrevascularization(surgery) After revascularization.postrevolutionOccurring after a period of revolution.postsaturationHappening after saturationpostseason(US, sports) The period after the end of the normal sports season during which extra games are held (such as playoffs or championships).postsectarianAfter or beyond sects or sectarianism, especially as a reaction to sectarianism.postsegregationAfter segregation.postselectionFollowing selection.postseparationThe period following a separation.postsermon(rare) After a sermon.postsessionAfter (the initiation of) a sessionpostsimulationFollowing simulation, typically as part of a training exercisepostspinfectionFollowing spinfectionpoststimulationAfter stimulation.poststratificationAfter stratification.postsynchronizationAlternative form of postsynchronisation.postteenBeyond the teenage years.posttension(construction) To pour concrete first and then stretch the reinforcing strands within it by means of jacks and anchorages.posttransactionPrior to a transaction.posttranscriptionAlternative form of posttranscriptional.posttransductionAfter transduction.posttransfectionFollowing transfectionposttransfusionAfter a blood transfusion.posttransitionFollowing transition.posttranslationposttranslationalposttranslocation(genetics) Following translocationposttransplantationSynonym of posttransplant.postulationThe act of postulating or something postulated.postunionAfter the formation of a union.postunionizationAfter unionization.postvacationAfter a vacation.postvaccinationAfter vaccination.postventionAn intervention conducted after a suicide, largely taking the form of support for the bereaved.postvisualization(film) Manipulation of recorded footage in order to change the way a scene is presented.postvitrificationFollowing vitrificationpostwoman(rare) A female letter carrier, a woman who delivers mail.potabilizationThe purifying of water to make it safe to drink.potamian(zoology, dated) A softshell turtle (family Trionychidae)potamogeton(botany) Any of the plants of the genus Potamogeton.potamoplankton(biology) plankton that inhabit riverspotassian(mineralogy) Containing potassiumpotassion(archaic) A potassium ion.potation(often in the plural) The act of drinking.potcheenAlternative form of poteen.potchermanOne who operates a potcher.poteen(Ireland, countable, uncountable) Illegally produced Irish whiskey; moonshine.potentationpotentiationpotentializationThe process of potentializing.potentiation(medicine) the synergistic effect of two drugs given simultaneouslypotentisationAlternative form of potentization.potentizationThe vigorous shaking of a homeopathic medicine, supposed to make it more effective.potgun(obsolete) A pot-shaped cannon; a mortar.potheenAlternative spelling of poteen.potin(obsolete) An alloy of copper, zinc, lead, and tin.potionA small portion or dose of a liquid which is medicinal, poisonous, or magical.potisignSynonym of qualisign.potman(British) A man employed in a public house to collect empty pots or glasses; a waiter in a similar establishment.potomitanA sacramental post or pillar in the middle of the peristyle in front of a voodoo temple, used as the focus of certain rituals.potteenAlternative spelling of poteen.pouldronAlternative form of pauldron.poultrymanA male poulterer.poultrywomanA female poulterer.poundmanA man whose job it is to catch stray animals (often dogs).poupeton(obsolete) A puppet.pourdown(rare outside dialects) Synonym of downpour.poussinA chicken reared to be eaten at a few weeks of age.povertician(politics, derogatory) Someone who is paid to work with the poor, especially one who profits at the expense of the poor; A welfare worker.powanCoregonus clupeoides, a species of freshwater whitefish endemic to Loch Lomond in Scotland.powderhornAlternative form of powder horn.powderizationThe process, or the result of powderizingpowdermanA man in charge of gunpowder.powenAlternative form of powanpowerchainAlternative form of power chain.powerdomainAlternative form of power domain.powertrainThe group of components in a vehicle that generate power and deliver it to the road surface, water, or air.powldronObsolete form of pauldron.poxvirionThe virion of a poxviruspoysonObsolete spelling of poison.pozzolanAny material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with Portland cements.practicalizationThe process of practicalizing.practicianA practitioner; someone who practises a particular profession, especially medicine.pradhaman(India, cooking) puddingpradhan(India, historical) An official in parts of India, equivalent to vizier in rank and function.pradimicinAny of a certain class of antibiotics.pradofloxacin(pharmacology) A particular veterinary antibiotic of the fluoroquinolone class.praeflorationAlternative form of prefloration.praefoliationArchaic form of prefoliation.praenomen(zoology) The genus name in a binomial scientific name.praeteritionAlternative form of preterition.praetorian(Ancient Rome) Of or pertaining to a praetor.pragmaticalisationThe process or the result of pragmaticalisingpragmaticalizationAlternative form of pragmaticalisation.pragmatician(linguistics) A linguist who specializes in pragmatics.prallethrinA certain pyrethroid insecticide.pralmorelin(pharmacology) A particular growth hormone–releasing hormone analogue.pralnacasanA caspase-1-specific peptidomimetic pyridazinodiazepine inhibitor.pranoprofen(pharmacology) A nonsteroidal anti-inflammatory drug used in ophthalmology.praseodymian(mineralogy) Containing praseodymiumprasinophyceanAny green alga of the class Prasinophyceae.prasinoxanthin(organic chemistry) The xanthophyll (3~{E},5~{E},7~{E},9~{E},11~{E},13~{E},15~{E},17~{E})-1-[(1~{R},4~{S})-1,4-dihydroxy-2,2-dimethyl-6-methylidenecyclohexyl]-18-[(1~{R},4~{R})-4-hydroxy-2,6,6-trimethylcyclohex-2-en-1-yl]-3,7,12,16-tetramethyloctadeca-3,5,7,9,11,13,15,17-octaen-2-one characteristic of prasinophycean algaepravastatin(organic chemistry, pharmacology) A statin used to lower blood cholesterol levels, especially after a heart attack.prawnA crustacean of the suborder Dendrobranchiata.prazosin(pharmacology) An alpha-blocker used chiefly as a smooth muscle relaxant, especially in the treatment of hypertension and benign prostatic hyperplasia.preabdomenThe enlarged anterior portion of the abdomen of a scorpion or sea scorpionpreablationprior ablationpreabortionBefore abortion (termination of pregnancy).preabsorbtionMisspelling of preabsorption.preabsorptionabsorption prior to some other processpreacclimationPrior to becoming acclimatedpreaccreditationBefore accreditation.preaccumulationaccumulation prior to some other operationpreaccusationprevious or prior accusationpreacetylationacetylation prior to some other operationpreacherman(religion) A preacherpreachification(informal) Preaching.preachman(obsolete, derogatory) A preacher.preachmenplural of preachmanpreacidificationA prior acidification.preacquisitionPrior to acquisitionpreactionprevious actionpreactivationactivation in advancepreacylationPrior to acylationpreadaptation(biology) An adaptation that evolved in an ancestral population, in which it served a different functionpreadministrationPrevious administration.preadmissionBefore admission (to a hospital, university, etc.).preadmonitionPrevious warning or admonition; forewarning.preadoptionBefore adoption.preadsorptionPrior adsorptionpreafternoonBefore the afternoon.preaggregationaggregation performed or produced prior to some other processprealbumin(dated, biochemistry) TransthyretinprealignTo align prior to some other processpreallocation(computing) allocation in advancepreamalgamationBefore amalgamation.preambulation(obsolete) A walking or going before; precedence.preamplificationThe use of a preamplifier.preamputation(surgery) Prior to amputationpreapplicationapplication in advancepreapprehensionAn apprehension or opinion formed before examination or knowledge.preascertain(transitive) To ascertain in advance.preaspiration(phonetics) A period of voiceless breathing that precedes some consonants in some languages—a sort of mirror-image of aspiration.preassign(transitive) To assign in advance.preassociationPrior association.preassumptionassumption in advancepreattentionThe noticing of something before attention is fully focused on it.preauctionBefore an auction.preaugmentationBefore augmentation.preauthorisationAlternative form of preauthorization.preauthorizationPrior to authorization.prebanBefore the enacting of a ban.prebargainPrior to a bargain being struck.prebifurcationPrior to bifurcationprebilaterianprior to the evolution of the bilateriansprebiotinylationPrior to biotinylationpreblownpast participle of preblowpreborn(chiefly in anti-abortion discourse) Not yet born.precalculationA calculation performed in advance.precalibrationPrior to calibrationprecampaignBefore a campaign.precancelation(American spelling) Alternative form of precancellation.precancellationThe act of precancelling.precanon(religion) Predating the development of a religious canon.precanyon(geology) Before the formation of a canyon.precarcinogenAny substance that can be converted into a carcinogenprecardioversionBefore cardioversion.precarisationBritish standard spelling of precarization.precarization(sociology) The process by which the number of people who live in precarity increases.precastrationBefore a castration.precatenation(genetics) catenation prior to replicationprecatheterizationcatheterization prior to some other operationprecation(rare) A prayer or act of praying; an earnest request.precautionPrevious caution or care; caution previously employed to prevent misfortune or to secure good.precelebrationCelebration in advance.precellularizationprior cellularizationpreception(rare, obsolete) A preconception or presupposition.precerebellin(biochemistry) A precursor of cerebellin.precertificationCertification in advance.precession(uncountable) Precedence.prechlorinationChlorination (typically of water) before some other process.prechosenchosen in advanceprechylomicronA structure that develops into a chylomicronprecipitation(meteorology) The amount of water precipitated in any form.precipitinAny antibody that reacts with an antigen to form a precipitate.precipitinogenA substance that produces a precipitin.precipitron(historical) An early electrostatic air purifier.precisianA religious purist; a Puritan.precisification(logic) The process of making a statement more precise.precision(loosely) The state of being precise or exact; especially, both exact and accurate.precivilisationAlternative form of precivilization.precivilizationThe time prior to civilization.preclassificationclassification prior to some other operationpreclean(transitive) To clean in advance.preclusion(countable) The act of precluding.precoagulationcoagulation (by means of a precoagulant) before filtrationprecoalitionBefore a coalition.precogitationPrevious cogitation.precognition(Scots law) The practice of taking a factual statement from a witness before a trial.precollectionA fashion collection made available shortly before the usual season for such garments.precollisionBefore collision.precollusionBefore collusion.precolumbianAlternative letter-case form of pre-Columbian.precolumnSituated before the column of a chromatographprecombustionAlternative spelling of pre-combustion.precommunionBefore Holy Communion.precompactionThe process of precompacting a material.precompensationcompensation in advanceprecompetitionOccurring before or in anticipation of a competition.precompilationThe act or process of precompiling.precompletionBefore completion.precomplexation(chemistry) the formation of a complex prior to another reactionprecomposition(music) Decisions made regarding a piece of music before composition begins, such as which key or which genre to use.precompressionCompression applied prior to something.precomputationcomputation in advancepreconcentration(chemistry) The concentration of a trace material prior to an analysispreconceptionAn opinion formed before obtaining adequate evidence, especially as the result of bias or prejudice.preconcertionThe act of preconcerting; preconcert.precondemn(transitive) To condemn beforehand.precondemnationcondemnation beforehandpreconditionA condition that requires satisfaction before taking a course of action.preconfigurationconfiguration in advancepreconfirmationPrior to confirmation.preconisationAlternative form of preconization.preconizationA publishing by proclamation; a public proclamation.preconsiderationPrior consideration; the act of considering something in advance.preconsign(transitive) To consign beforehandpreconsolidationPrior to consolidationpreconstrictionconstriction prior to some other processpreconstructionWork done in preparation for construction, such as of a building.preconsultationPrior to consultation.precontemplation(psychology) Prior to contemplation (concerning one's behaviour)precontraction(biology) Prior to contractionpreconventionBefore a convention (meeting or gathering).preconversionPrior to conversionpreconvictionPrior to conviction.precoordinationcoordination prior to some other processprecoronationBefore a coronation.precorrectionA correction applied in advanceprecorrin(organic chemistry) Any of a group of methylated uroporphyrinogens that are intermediate in the biosynthesis of vitamin B12precrastination(psychology) The completion of a task too quickly or too early for the optimal outcome; the compulsion to act in this way.precremationBefore cremation.precrystallizationcrystallization in advance of another processprecultivationcultivation prior to some other operationprecurtainBefore the curtain rises at the start of a play.predacean(archaic) Any carnivorous animal.predamn(transitive, possibly vulgar) To damn in advance; to predestinate to damnation.predamnation(theology) Predestined damnation.predation(zoology) The preying of one animal on others.predawnThe period immediately preceding dawn.predecarboxylation(biochemistry) Prior to decarboxylationpredecimalisationNon-Oxford British English standard spelling of predecimalization.predecisionA preliminary decision, or one made in advancepredeclaration(programming) A declaration made in advance; forward declaration.predecompositiondecomposition prior to some other processprededicationA dedication made previously or beforehand.predefectionBefore defection.predefinitionThe act or process of defining something in advance.predeformationdeformation prior to some other processpredegenerationPrior degenerationpredegradationprior degradationpredeliberationPrevious deliberation.predelictionMisspelling of predilection.predelimitationprior delimitationpredelineationPrevious delineation.predenaturationpreliminary denaturationpredentinThe matrix of organic fibres that calcifies to form dentin.predepositionThe act of depositing something in advance.predepressionAlternative spelling of pre-depression.prederivatization(organic chemistry) derivatization prior to some other processpredesign(transitive) To design beforehand; to predetermine.predesignationThe act of predesignating.predestinarianOne who believes in predestination.predestination(theology) The doctrine that everything has been foreordained by God or by fate.predetentionPrior to detention.predeterminationThe act of determining beforehand.predetonationWhen a nuclear bomb fails to produce full yield, due to the chain reaction starting prematurely, before the system is at optimum criticality.predevaluation(economics) Before devaluation.predicationA proclamation, announcement or preaching.predictionA statement of what will happen in the future.predifferentiationprior to differentiationprediffusiondiffusion prior to some other processpredigestionThe partial hydrolysis etc. of food, by enzymes or other materials, prior to normal digestionpredilatation(surgery) dilatation (typically with a balloon) prior to some other procedurepredilectionA condition of favoring or liking; a tendency towards; proclivity; predisposition.predilutiondilution in advance of another processprediluvianBefore the Flood; antediluvian.predimension(mathematics) The result of a function on a group of sets, where the function satisfies three conditions: (1) it returns 0 for the empty set; (2) if one set is contained in another set, the function always returns a value that is less than or equal to the result for the containing set; (3) the result for the union of two sets is less than or equal to the sum of the results for each of those sets individually minus the result for their intersection.prediscontinuationBefore discontinuation.prediscussionBefore a discussion.predispositionThe state of being predisposed or susceptible to something, especially to a behavior or a health condition.predisruptionBefore disruption.predisseminationprior disseminationpredissertationBefore a dissertation.predissociation(physics, chemistry) The dissociation of a molecule, following absorption of light energy, by tunnellingpredissolutionBefore dissolution.predistillationdistillation prior to another processpredistortionDistortion prior to some other process.predistributionA distribution made in advance.prediversionBefore a diversion.predivision(biology) division of a chromosome prior to meiosispredomesticationBefore domestication.predominationThe act or state of predominating; ascendency; predominance.predominion(rare) predominance; prevalence; superior influence or power.preduplicationPrior to duplicationpreeducationPrior to education.preejectionOccurring prior to ejection.preelectionAn election beforehand.preemptionAn act or process that preempts; a preventive or forestalling action; as:preenA forked tool used by clothiers for dressing cloth.preenactionThe process of preenacting.preenergizationenergization prior to some other operationpreequilibrationPrior to equilibrationpreexaminationbefore an examinationpreexcitationearly excitation; applied to a condition where the ventricles of the heart become depolarized too early, which leads to their partial premature contractionpreexilianBefore an exile, especially the Biblical exile of the Jews.preexpectationprevious expectationpreextractionextraction prior to some other operationprefabricationThe manufacture of prefabricated components, and their assembly.prefecundation(biology, dated, rare) The collective changes or conditions preceding fecundation, especially those affecting the ovum.prefermentationPrior to fermentationprefertilizationPrior to fertilizationprefigation(linguistics, rare) Synonym of prefixation.prefigurationA vague representation or suggestion of something before it has happened or been accomplished.prefiltrationBefore filtration.prefinalizationBefore finalization.prefinition(rare) a previous limitation or definitionprefixation(linguistics) The adding of a prefix to a word.prefixion(archaic) The act of prefixing: synonym of prefixation.preflexion(zoology) Before the flexion stage of larval developmentprefloration(botany) The arrangement (vernation) of floral parts in a bud.prefoldinAny of a family of proteins used in protein-folding complexes. A prefoldin molecule works as a transfer protein in conjunction with a molecule of chaperonin to form a chaperone complex and correctly fold other nascent proteins.prefoliation(botany) Vernation (arrangement within a bud) of leaves.preformalinPrior to treatment with formalinpreformationPrior formation.preformulationThe formulation of a pharmaceutical drug in advance of general availabilityprefossilizationprior fossilizationprefractionationfractionation prior to some other processprefreshman(US, sometimes attributive) A student who has not yet become a freshman.prefunctionalizationfunctionalization prior to another processprefusionPrior to fusion.pregabalin(pharmacology) An anticonvulsant drug used for neuropathic pain and as an adjunct therapy for seizures.pregastrulationPrior to gastrulationpregenerationGeneration in advance.pregentrificationPrior to gentrification.pregerminationPrior to germinationpregestationBefore gestation.pregiven(philosophy, ontology) Existing in the world, as opposed to arising from human apprehension.preglobalizationBefore globalization.preglottalizationThe act of preglottalizing.pregnation(obsolete) Pregnancy.pregraduationPrior to graduation from an academic course.pregrowngrown in advancepregustationThe act of tasting something beforehand; foretaste.prehabilitationA form of strength training that aims to prevent injuries before they can occurprehadron(physics) A confined complex of quarks that has some characteristics of a hadronpreharden(engineering) To harden before machining.prehensionThe act of grasping or gripping, especially with the hands.prehibernationPrior to hibernationprehistorianA student of, or expert in prehistory.prehospitalizationPrior to hospitalization.prehumanPreceding the advent of modern humanity, Homo sapiens.prehumiliationBefore humiliation.prehybridisationAlternative spelling of prehybridization.prehybridizationhybridization prior to some other processprehydrationhydration prior to some other processprehypertension(medicine) A blood pressure higher than normal but not high enough to be considered hypertension.preignition(automotive) The premature detonation of a fuel charge in Four-stroke cycle engines.preilluminationIllumination prior to some other process.preimmigrationBefore immigration.preimmunizationimmunization in advance of an expected threatpreimmunoadsorptionPrior to immunoadsorptionpreimplantation(medicine) Prior to implantation.preimplementationPrior to implementationpreinactivationAlternative form of pre-inactivation.preinaugurationPreceding an inauguration, often specifically the inauguration of a United States presidentpreincision(surgery) Prior to incisionpreinclinationA prior inclination or leaning.preinclusionBefore inclusion.preincorporation(business) Prior to incorporation.preincubationincubation prior to some other treatment or processpreinductioninduction prior to some other processpreindustrialization(sometimes attributive) The period before industrialization (both long before and soon before).preinfarctionThat occurs prior to a myocardial infarctionpreinfectioninfection prior to another processpreinfestationAn infestation with one organism before a second infestation with another.preinfiltrationinfiltration prior to some other processpreinflationinflation prior to some other processpreinfusionAny procedure that proceeds infusion (e.g. the wetting of ground coffee prior to production of espresso).preingestionprior ingestionpreinitialization(computing) A phase prior to initialization, when something is preinitialized.preinitiationinitiation in advance or too soonpreinjection(medicine) Before an injection is administered.preinoculationPrior to inoculationpreinsertionPrior to insertionpreinspectionBefore inspection.preinstallationThe process or result of preinstalling.preinstructionBefore being instructed or taught.preintegrationprior to integrationpreintermissionBefore an intermission.preinterpretationThe act or result of preinterpreting; an interpreting in advance.preinterventionBefore intervention.preintimationPrevious intimation; a suggestion beforehand.preintroductionBefore the introduction of something.preintubationBefore intubation.preinvasionBefore an invasion; the state before an invasion.preinventionBefore the invention of something; applied to legal agreements in which an employee agrees to assign to his/her employer the rights to any invention he/she later creates while employed.preinvestigationPrior to investigationpreionizationionization in advance of another processpreirrigationBefore irrigation.preisolationisolation prior to some other operationprejudicationjudgment without due examination of facts and evidenceprekallikreinA serine protease that complexes with high-molecular-weight kininogen; the precursor of plasma kallikrein.prekindergartenBefore kindergarten, or not yet old enough to attend it.preknownAlready known; known in advance.prelamin(biochemistry) Any of a group of precursors of laminsprelaminationlamination in advanceprelapsarian(Judaism, Christianity) Of, or relating to the period of innocence before the Fall of man; innocent, unspoiled.prelation(archaic) The setting of one item above another; preference.prelectionA public lecture or reading, especially delivered at a college or university.prelegislationPrior to the introduction of legislation.prelesionBefore the occurrence of a lesion.prelibationA tasting beforehand, or by anticipation; a foretaste.preliberationPrior to liberation.prelipoprotein(biochemistry) The precursor of a lipoproteinpreliquidationBefore liquidation.prelisten(intransitive) To listen in advance.prelitigationPrior to litigation.prelocalization(biology) The original localization of structures in an unsegmented embryo that become specific organs in the adultprelockdownBefore a lockdown.prelocution(linguistics) a mental planning act before a verbal locution in a speech actprelumirhodopsinbathorhodopsinpreluncheonBefore luncheon.prelusionA prelude; something that comes first.premafloxacin(pharmacology) A quinolone antibiotic.premammalianBefore the evolution of mammals.premanA member of an organized criminal gang in Indonesia.premarginalization(mathematics) marginalization prior to some other procedurepremasticationThe act of chewing food for the purpose of physically breaking it down in order to feed another individual.prematriculationBefore matriculation.prematurationPrior to maturationpremechanizationAlternative form of pre-mechanization.premedicationPre medication.premeditationThe act of planning or plotting something in advance, especially a crime.premenstruationAlternative form of premenstrual.premetazoanPrior to the evolution of metazoanspremicturitionPrior to micturition / urinationpremigrationBefore migration.premillenarianpremillennialpremiumisationAlternative form of premiumization.premiumization(marketing) The move towards more expensive premium products.premobilization(sometimes attributive) Actions taken in advance of, and in preparation for, mobilization (of an army).premodernPreceding or predating the modern era.premodernizationBefore modernizationpremodification(grammar) modification by a premodifierpremoistenTo moisten in advance.premoltenPrior to being in a molten statepremonitionA clairvoyant or clairaudient experience, such as a dream, which resonates with some event in the future.premonsoonBefore a monsoonpremonstration(archaic) A showing beforehand; foreshowing.premotionPrevious motion or excitement to action, especially a divine impulse that precedes human action, guiding or enabling individuals to act in accordance with God's will.premotoneuronA structure that develops into a motor neuronpremultiplicationThe process of premultiplying.premunition(medicine) Immunization due to having had the disease before.premutationOf or relating to a premutation.premyelinationThe stage prior to myelinationprenasalisationAlternative spelling of prenasalization.prenasalizationThe act of prenasalizing.prenationalizationPrior to nationalization.prenegotiationDiscussion prior to formal negotiations.prenewtonianBefore the work of Isaac Newton.prenomenAlternative form of praenomen.prenominationbefore a nominationprenotificationnotification in advanceprenotionForeknowledge.prenoun(grammar) A particle which precedes a noun, typically used in the Algonquin languages.prensation(obsolete) The act of seizing with violence; seizureprenucleation(cytology) Occurring before nucleation; occurring before the formation of a nucleus.prenunciation(obsolete) The act of announcing or proclaiming beforehand.prenylationisoprenylationprenylnaringeninAny of a class of prenylflavonoids that are potent phytoestrogens found in hops.prenylprotein(biochemistry) Any prenylated proteinpreobservationBefore observation.preobtain(transitive) To obtain beforehand.preocclusionPrior to occlusion.preoccupationThe state of being preoccupied or an idea that preoccupies the mind; enthrallment.preon(physics) A hypothetical point-like particle, supposed to be a subcomponent of quarks and leptons and possibly bosons too.preoperationPrior to an operation (military, surgical, or other).preopinionOpinion previously formed; prejudice.preopsonizationThe process of preopsonizingpreoptimisationAlternative spelling of preoptimization.preoptimization(computing) An advance optimization; an instance of preoptimizing.preoptionThe right of first choice; the right or ability to choose something before others.preordain(transitive) To determine the fate of something in advance.preordinationThe state or process of things being preordained.preorganisationAlternative form of preorganization.preorganizationorganization in advance of some other process or eventpreorientationPrior to orientation.preoriginAn ultimate source or origin, before the generally known or accepted origin.preovipositionPrior to oviposition.preovulation(biology) The period of time that precedes ovulation.preoxidationoxidation prior to some other processpreoxiredoxinMisspelling of peroxiredoxin.preoxygenationoxygenation prior to some other processpreparation(uncountable) The act of preparing or getting ready.preparticipationPrior to participation.prepatternA pattern established in advanceprepenetrationPenetration prior to another process.preperceptionA preliminary perceptionpreperfusionperfusion in advance of some other operationpreperifusionperifusion in advance of some other operationprepermeabilizationpermeabilization prior to some other operationprepersuasionThe process of preparing a person to be amenable to persuasion.preperturbationPrior to perturbationprepetition(law) Of a claim, event, or condition existing prior to a bankruptcy petition.prephosphorylationprior phosphorylationprepilinSynonym of prepilin peptidase.preplan(ambitransitive) To plan in advance.preplosionThe phonological process of preocclusion.prepolarizationpolarization before some other operationprepolymerizationThe process of prepolymerizing.preponderationThe act or state of preponderating; preponderance.prepopulationThe act of prepopulating.preportionTo divide into individual portions before use.preposition(grammar, broad sense) An adposition.prepossession(uncountable) A preoccupation; having possession beforehand.prepostmodernHaving the characteristics of a movement or style (of art, architecture, literature, science, or philosophy) that came before postmodernism; modern.prepreparationPreparation that takes place before the main period of preparation.preprioception(rare) Alternative form of proprioception.preproalbumin(biochemistry) A precursor of an albumin that has an extension of amino acids at the N-terminuspreprocalcitonin(biochemistry) A precursor in the biosynthesis of procalcitonin, as well as calcitonin and katacalcin further downstream.preprocathepsinA precursor of procathepsinspreprocollagen(molecular biology) The peptide that undergoes post-translational processing to form collagen.preproductionAll the preliminary arrangements that are made before the start of a project, especially before the filming of a movie.preproenkaphalinMisspelling of preproenkephalin.preproenkephalinA precursor of proenkephalinpreproghrelinA precursor of proghrelinpreproglucagon(biochemistry) Any polypeptide precursor of a proglucagon.preprohepcidinA prepropeptide that is a precursor of prohepcidinpreprohibitionBefore Prohibition (period during which alcoholic beverages were restricted or banned).preprohypocretin(biochemistry) A precursor of hypocretin.preproinsulin(biochemistry) A biologically inactive precursor to the endocrine hormone insulin.preprolactin(biochemistry) The precursor to prolactinprepromelanin(biochemistry) A precursor of melanin.prepromotionBefore a promotion.prepronociceptin(biochemistry) A protein that is the precursor of nociceptin and nocistatinpreproopiomelanocortinA precursor polypeptide involved in the synthesis of various hormones.preproorexin(endocrinology, biochemistry) A precursor of orexin, selectively expressed in the lateral hypothalamic area.preproproteinThe precursor of a proproteinpreprorelaxin(biochemistry) A precursor of prorelaxin.preprosomatostatin(biochemistry) A precursor of prosomatostatinpreprotachykinin(biochemistry) Any of a family of peptide precursors of the tachykinin neurotransmitterspreprotein(biochemistry) A polypeptide chain that is in the process of growing into a protein by the addition of successive amino acid moietiespreprothrombinA precursor of thrombin.preprothyrotropin(endrocrinology, biochemistry) A large precursor protein of thyrotropin-releasing hormone, derived by posttranscriptional processing and enzymatic modification.preprotoxinThe precursor of a protoxinpreprovision(transitive) To provision in advance.preprovocationPrior to provocation.prepublicationPreceding, or in preparation for, publication.prepupationprior to pupationprepurificationpurification prior to some other processprequalificationqualification in advanceprequantization(mathematics, physics) The process of finding a quantum analog of a classical system by introducing a quantization condition.prequelization(informal) The creation of a prequel to a work.preradiationPrior to therapeutic radiationpreransimple past of prerunprerandomisationprior randomisationpreratificationPrior to ratification.prerealization(US, finance) Occurring before the realization of money or other assets.prerebellionBefore a rebellion.prerecession(economics) Occurring before a recessionprereconstructionThat occurs prior to reconstructionprereductionreduction prior to some other process or reactionpreregistrationAn early registration, before the normal or traditional time, as with early online check-in at hotels.preregulationBefore the introduction of a regulation.prerehabilitationPrior rehabilitationprerejectionPrior to rejection.preremissionPrior to remission.prerenovationOccurring or existing before a renovationprereplicationBefore replicationpreresection(surgery) Prior to resectionprerestorationPrior to a restoration project.preretractionPrior to retractionprereturnBefore a return.prereversionBefore reversion.prerevisionPrior to revisionprerevolutionOccurring before a period of revolution.prerotationA swirling motion in fluid entering a pump.prerunThe act of running something in advance.presanctionBefore the introduction of a sanction.presaturationHappening before saturationpresbyterianOf or pertaining to a presbyter, or to ecclesiastical government by presbyters; relating to those who uphold church government by presbyters; also, to the doctrine, discipline, and worship of a communion so governed.presbytinanAny leaf monkey of the genus Presbytis.prescan(transitive) To scan in advance.prescissionThe act or result of prescinding.prescreen(ambitransitive) To screen in advance for potential problems, especially as a preliminary screening before further screening.prescription(medicine) The medicine or treatment provided by such an order.preseason(sports) The period before the start of a sporting season, during which players undergo training and venues are preparedpresectarianPrior to sects; prior to sectarianism.presection(transitive) To cut into pieces in advance.presegmentationsegmentation in advancepreselection(politics) The process by which a candidate for public office is selected, usually by a political partypresenilin(biochemistry) Any of a class of transmembrane proteinspresensationprevious sensation, notion, or ideapresension(obsolete) a previous perception; a premonitionpresensitizationBefore sensitizationpresentationThe act of presenting, or something presented.presentionObsolete form of presension.preseparationprior separationpresepsinA particular chemiluminescent enzyme biomarker for bacterial sepsis.presermonBefore the sermon.preseroconversionPrior to seroconversionpreservationThe act of preserving; care to preserve; act of keeping from destruction, decay or any ill.presessionBefore (the initiation of) a sessionpresharpen(transitive) To sharpen in advance.preshorten(transitive) To shorten in advance.presidentialisationThe process of a political system or political party adjusting to having a president, rather than some other configuration of executive power.presign(transitive) To sign in advance.presignificationA prior signification; the act of signifying or showing beforehand.presimianExisting or occurring before the existence of anthropoid apes.presimulationsimulation prior to some other processpresoften(transitive) To soften something in advance or prior to another operation.presolubilisationAlternative form of presolubilization.presolubilizationsolubilization prior to some other processpresonicationsonication prior to some other processprespecificationspecification in advanceprespeculationBefore financial speculation.prespinBefore a spin stage.presporulationPrior to sporulation.prespunspun in advancepression(rare) Pressure or an act of applying pressure.pressmanSomeone who operates a printing press.pressmenplural of pressmanpresspersonA member of the press; a journalist.pressrunThe number of copies of a publication printed at one time.pressurisation(British spelling) The act or process of increasing pressure within a space.pressurizationThe act or process of increasing pressure within a volume of space.pressuron(physics) A hypothetical scalar particle that couples to both gravity and matter.presswomanA female pressman.prestabilizationPrior to stabilizationprestandardizationPrior to standardization.prestarvationPrior to starvation.prestation(UK, law, obsolete) A payment of money; a toll or duty.prestidigitationA performance of or skill in performing magic or conjuring tricks with the hands.prestigiation(obsolete) legerdemain; prestidigitation (deception, or juggling)prestimulationBefore stimulationprestin(biochemistry) A protein in the hairs of the inner earprestraighten(transitive) To straighten in advance.prestratificationprior stratificationprestrengthen(transitive) To strengthen in advance.presuburbanPrior to the development of a suburb.presumptionThe act of presuming, or something presumed.presuppositionAn assumption made beforehand; a preliminary conjecture or speculation.presuppressionprior suppressionpresweetenTo sweeten in advance.preswollenswollen in advancepresylvian(anatomy) Anterior to the Sylvian fissure of the brainpresynchronizationsynchronization prior to some other operationpretabulationBefore tabulation.pretan(transitive) To tan lightly or partially, in preparation for full tanning.pretaxationBefore taxation.preteenOf, relating to, or designed for, or being children between the ages of approximately 10 and 12.pretelevisionBefore the introduction of television.pretelsonThe tergite just in front of the telsonpretendianAlternative letter-case form of PretendianpretensionA claim or aspiration to a particular status or quality.pretentionArchaic spelling of pretension.pretergeneration(rare) Preternatural generation; monstrous birthpretergressionThe act of going past limits or bounds.preterhumanMore than human; superhuman.preteritionThe act of passing by, disregarding or omitting.preterminationPrior to termination.pretermissionOmission; failure to do something.pretervection(obsolete, nonce word) The act of carrying past or beyond.prethermalization(physics) localized thermalization that leads to full thermalization over timeprethin(transitive) To thin in advance.prethrombinA subunit of prothrombinpretinAlternative form of pre-tin.pretorianAlternative spelling of praetorian.pretransactionPrior to a transaction.pretranscriptionPrior to transcription.pretransductionBefore transduction.pretransfusionBefore transfusion.pretransitionBefore a transition; pretransitional.pretranslation(computing) Translation performed in advance.pretranslocation(genetics) Prior to translocationpretransmissionPrior to transmission.pretransplantationSynonym of pretransplant.pretransportationBefore transportation (deportation to a penal colony).pretribulation(Christianity) Before the Tribulation.prettification(colloquial) The act of making someone or something pretty.pretubulysinA tubulysin precursor (2S,4R)-2-methyl-4-[[2-[(3R)-4-methyl-3-[methyl-[(2S,3S)-3-methyl-2-[[(2R)-1-methylpiperidine-2-carbonyl]amino]pentanoyl]amino]pentyl]-1,3-thiazole-4-carbonyl]amino]-5-phenylpentanoic acidpreturn(skiing) The movement that leads into a turn.pretweenOf a child: approaching the age of approximately 11.pretzelization(rare) The act of pretzelizing.preunificationPrior to unification.preunionPrior to the existence of a union.preunionizationPrior to unionization.preurbanDescribing a society before urbanizationpreuroporphyrinogenhydroxymethylbilaneprevacationBefore a vacation.prevaccinationBefore vaccination.prevalidationThe act or process of prevalidating.prevaricationEvasion of the truth.prevascularizationvascularization prior to some other operationprevegetationBefore the appearance of vegetation.prevenception(medicine, obsolete) contraception.preventionThe act of preventing or hindering; obstruction of action, access, or approach; thwarting.previrializationPrior to virializationprevirionA subviral particleprevisionAdvance knowledge; foresight.previsitationPrior to visitation.previsualization(film) Any technique that attempts to visualize a scene before the filming begins.previtaminSynonym of provitamin.prevocalizationA minor vocal sound produced in advance of a significant sound.prewarn(transitive) To warn beforehand; to forewarn.prewhiten(signal processing, transitive) To modify (a data set) to make the samples statistically independent, analogous to white noise.prian(archaic) Alternative form of pryan.pridian(archaic) Of or relating to the day before, or yesterday.priestriddenAlternative form of priest-ridden.prillion(mining, archaic) Tin extracted from the slag.primatomorphanRelating to primatomorphsprimitivizationThe act of reducing something to a primitive state, allowing development, or regressing to an immature state.primocinA broad-spectrum antibiotic and fungicideprimoinfection(virology) The first stages of an infection.primordianAny of several kinds of plum.primperan(medicine) Synonym of metoclopramide.primulin(biochemistry) An anthocyanin, the 3-galactoside of malvidin, found in Primula sinensis.prin(northern UK, dialectal) Alternative spelling of preen.princekin(dated) A petty prince; a princeling.princessian(rare) Of or characteristic of a princess.princessification(informal) The process of making or becoming girly or hyperfeminine.principiation(archaic) analysis into primary or elemental partsprionA petrel of the genera Pachyptila and Halobaena.prionisationAlternative form of prionization.prionizationThe misfolding of a protein to form a prionprioritarianOne who subscribes to prioritarianism.prioritisation(British spelling) Alternative form of prioritization.prioritizationThe process of assigning priorities to things or tasks.prismatizationThe process of prismatizing.prison(uncountable) Confinement in prison.prisonizationThe process of assimilation to the customs, social norms, etc. of a prison.pristinamycin(pharmacology) An antibiotic used primarily in the treatment of staphylococcal infections, and to a lesser extent streptococcal infections.pristinin(biochemistry) A posttranslationally modified peptide present in Streptomyces pristinaespiralisprivateersman(nautical) The captain or member of the crew of a privateer.privateersmenplural of privateersmanprivationThe state of being very poor, and lacking the basic necessities of life.privatisationNon-Oxford British English standard spelling of privatization.privatizationThe transfer of a company or organization from government to private ownership and control.privatopianRelating to a privatopia.prizemanThe (male) winner of a prizeprizenEye dialect spelling of prison.prn(medicine, pharmacology) Abbreviation of pro re nataproabortionSupportive of the practice and/or legalization of abortion.proaccelerin(biochemistry) Factor V, a protein of the coagulation system.proacrosin(biochemistry) A protein that is a precursor of acrosin.proactionProactive behavior or influence.proadifenAn inhibitor of cytochrome P450 enzymes, preventing some types of drug metabolism.proadministrationIn favour of the administration (part of government).proadrenomedullinA component of adrenomedullin that is used as a biomarkerproaerolysinThe protoxin of aerolysinproamanullinAn amatoxin present in mushrooms of the genus AmanitaproamnionAn area of the blastoderm at the cephalic end of a vertebrate embryo, in which there is no mesoderm separating the ectoderm and endodermproamphiregulinA growth factor that promotes formation of amphiregulinproansamycin(biochemistry) Any of a group of macrocyclic compounds that are intermediates in the biosynthesis of ansamycinsproanthocyanidinAn antioxidant flavonoid with possible health benefits, found in many plant sources, including apples, bilberry, grapeseed, pine bark, and black chokeberry.proanthocyanin(biochemistry) Any glycoside of a proanthocyanidinproapolipoprotein(biochemistry) A metabolic precursor of apolipoproteinsproavianAny of several extinct animals proposed as an evolutionary link between fossil reptiles and fossil birds; a protobird.probabilificationThe process of probabilifying.probainognathianA members of the Probainognathia clade of therapsid animals.probasin(biochemistry) A protein expressed in the epithelial cells of the prostate.probationA period of time when a person occupies a position only conditionally and may be removed if certain conditions are not met.problematisationBritish standard spelling of problematization.problematizationThe process of problematizing, or something problematized.proboscideanAny of various large, herbivorous mammals, of the order Proboscidea, that have a trunk; an elephant.proboscidianAlternative spelling of proboscidean.procalcificationThat promotes calcification.procalcitonin(biochemistry) A peptide precursor to the hormone calcitoninprocarcinogenAny substance that is transformed into a carcinogen by metabolism.procathepsin(biochemistry) Any of a family of proteins that are involved in the production of cathepsinsproceduralizationThe process, or the result of proceduralizingprocellarian(zoology) Any of a family of oceanic birds (Procellaridae) including the petrels, fulmars, and shearwaters.proception(philosophy) according to the philosophy of Justus Buchler, the process of the development of a person's experience by the interaction of behaviour and the environment.processionThe act of progressing or proceeding.prochein(law, obsolete) Next; nearest.prochemerin(biochemistry) A precursor of chemerin.prochorionA temporary structure that surrounds the blastodermic vesicle in some animals.prochymosin(biochemistry) The precursor of chymosinprocistocardinA particular steroid glycoside.proclamationA statement which is proclaimed; formal a public announcement.proclinationForward inclination, especially of the teeth.procoagulationAn association of particles that develops into coagulationprocoelian(obsolete, zoology) Any of the Procoelia, a former suborder of Crocodilia.procollagen(biochemistry) The precursor of collagen; it is formed in fibroblasts and converted to collagen by a peptidase.proconservationIn favour of conservation.proconventionIn favour of a convention.proconvertinAn enzyme of the serine protease class.procrastinationThe act of postponing, delaying or putting off, especially habitually or intentionally.procrasturbation(slang, humorous, somewhat vulgar) The act of putting off something important or wasting time by engaging in a leisure activity, particularly masturbation.procreationThe process by which an organism produces others of its biological kindprocrusteanEnforcing strict conformity through disregard of individual differences or special circumstances.proctolinA particular neuropeptide present in several insectsprocurationThe act of procuring; procurement.procyanidinproanthocyanidinprocyclin(biochemistry) A protein developed in the surface coating of trypanosomes whilst in the fly vector.prodefensin(biochemistry) Any of a class of matrix proteins that are precursors to defensins.prodelision(phonology) A form of elision in which the latter word loses its first vowels.prodelphinidin(biochemistry) The polymeric tannins, composed of gallocatechin, that yield delphinidin during depolymerization under oxidative conditions.prodifferentiationThat promotes differentiationprodigiosin(microbiology) A red pigment produced by certain bacteria.prodition(obsolete) Disclosure.prodomainA domain of a proproteinproductionThe act of producing, making or creating something.productionalisation(British) Alternative spelling of productionization.productionalization(business) The adoption of an approach or technology in a live production environment.productionisationThe process of turning a prototype into a mass-production product.productionization(US) Alternative spelling of productionisation.productisationAlternative spelling of productization.productization(computing, business) The act of modifying something, such as a concept or a tool internal to an organization, to make it suitable as a commercial product.prodynorphin(biochemistry) An opioid polypeptide hormone involved with chemical signal transduction and cell communication.proemionAlternative form of proemium.proenkephalin(biochemistry) A precursor of leuenkephalin and metenkephalin.proepithelin(biochemistry) A growth factor and regulator of proliferation, that is converted to epithelinsprofanationThe act of profaning; desecration, blasphemous behaviour, defilement.profection(obsolete) A setting out; going forward; advance; progression.professionA declaration of faith.professionalisationAlternative spelling of professionalization.professionalizationThe act or process of professionalizing, or becoming professional.profibrinolysinSynonym of plasminogen.profilaggrin(biochemistry) A polymeric precursor of filaggrin present in keratohyalin granules in cells of the stratum granulosum.profilin(biochemistry) An actin-binding protein involved in the dynamic turnover and restructuring of the actin cytoskeleton, found in all eukaryotic organisms in most cells.proflavinAlternative form of proflavine.profligationLicentiousness; lewd behavior.profusionabundance; the state of being profuse; a cornucopiaprogastrinThe inactive precursor of gastrinprogenation(rare) The act of progenatingprogenerationThe act of begetting; propagation.progeoglycanMisspelling of proteoglycan.progerinA truncated version of the protein lamin A, involved in progeria.progestagen(biochemistry, steroids) Alternative spelling of progestogen.progestin(chemistry) A synthetic progestagen intended to mimic the effects of progesterone, often for contraceptive purposes.progestogen(biochemistry, steroids) The steroid hormone progesterone.proghrelin(physiology) Any of a class of peptides produced by ghrelin cells of the gastric mucosaproglottidizationThe development of proglottid segments of a tapeworm.proglucagon(biochemistry) Any of a group of polypeptides that are cleaved to produce glucagon.proglumetacin(pharmacology) A nonsteroidal anti-inflammatory drug.proglutelin(biochemistry) A glutelin precursorprognosticationA statement about or prior knowledge of the future.prognostificationAlternative form of prognostication.progoitrin(organic chemistry) A glycoside of 1,5-vinyl-2-thiooxazolidone present in the foliage of brassicas.progradation(geology) The growth of a river delta farther out into the sea over time, as it gains more sedimentprogranulinA precursor protein to granulin.progressionThe act of moving from one thing to another.progunSupportive of guns, especially widespread firearm training.prohemolysin(biochemistry) A precursor of hemolysinprohepcidin(biochemistry) A propeptide that is a precursor of hepcidinprohibitin(biochemistry) A protein, found in almost all living things, thought to have multiple functions.prohibitionAn act of prohibiting, forbidding, disallowing, or proscribing something.proinObsolete form of prune.proinflammationproinflammatoryproinsulin(biochemistry) A polypeptide that is the prohormone precursor of insulinprointerventionIn favour of intervention.proirrigationIn favour of irrigation.projectionSomething which projects, protrudes, juts out, sticks out, or stands out.projectivisationAlternative form of projectivization.projectivization(mathematics, algebraic geometry, birational geometry) A process (more formally, a mapping) that, given a vector space, specifies an associated projective space; (loosely) the projective space so specified.projectizationThe allocation of funds to a specific project regardless of any other consideration.prokeimenon(Christianity) In the liturgical practice of the Orthodox Church and Byzantine Rite, a psalm or canticle refrain sung responsorially at certain points of the Divine Liturgy or the Divine Office, usually to introduce a scripture reading.prokimenonAlternative form of prokeimenon.prokineticin(biochemistry) Any of a family of secreted proteins that contract gastrointestinal smooth muscleprolactin(biochemistry) A peptide gonadotrophic hormone secreted by the pituitary gland; it stimulates growth of the mammary glands and lactation in females.prolactostatin(biochemistry) dopamine, when regarded as a regulator of prolactin secretionprolamin(biochemistry) Any of a group of plant storage proteins that have a high proline content, found in cereals.prolapsion(medicine, obsolete) prolapseprolarginA leucine-rich repeat protein present in connective tissue extracellular matrix. It functions as a molecule anchoring basement membranes to the underlying connective tissue.prolation(music) The relative time value of a minim to a semibreve in medieval music.prolegomenonA prefatory discussion; a formal essay or critical discussion serving to introduce and interpret an extended work.proletarianOf or relating to the proletariat.proletarianisationNon-Oxford British English standard spelling of proletarianization.proletarianizationThe act or process of making somebody or something proletarian.proletarizationAlternative form of proletarianization.proliferation(uncountable) The process by which an organism produces others of its kind; breeding, propagation, procreation, reproduction.prolification(dated) The generation of young.prolipoproteinInvolved in the biosynthesis of lipoproteinprolixicinAn antimicrobial peptide isolated from Rhodnius prolixusprolixin(medicine) Synonym of fluphenazine.prolockdownIn favor of a lockdown (a confinement as security measure).prolocution(obsolete) An introductory speech.prologomenonMisspelling of prolegomenon.prolongationThe act of prolonging.proluciferin(biochemistry) That promotes the formation of luciferinprolusionA trial before the principal performance; a prelude.promanation(obsolete) The act of flowing forth; emanation.promegapoietinA drug given during chemotherapy to increase blood cell regeneration.promelaninThat promotes the formation of melaninpromessionThe disposal of human remains by freeze-drying.prometonA herbicide, N,N'-diisopropyl-6-methoxy-1,3,5-triazine-2,4-diamine.prominsodium glucosulfone, a sulfone drug, broken down in the body to dapsone, that was investigated for the treatment of malaria, tuberculosis, and leprosyprominin(biochemistry) Any of a family of polytopic membrane proteins found in all animalspromissionA style of wrestling that combines professional wrestling moves and submission holds.promitochondrionA primitive mitochondrion that lacks some inner membranespromotionAn advancement in rank or position.promulgationThe act of promulgating or announcing something, especially a proclamation announcing a new law.promutagenAny material that promotes the production of a mutagen.promyelination(biology) The process that switches on myelination.pronAbbreviation of pronoun.pronapin(biochemistry) A storage protein present in Brassica napuspronationWalking on the inner edge of the foot.pronephron(biology) The first part of the urogenital system to be differentiated in a vertebrate embryo, which functions as a simple excretory organ in simpler forms, serves as a provisional kidney in some fish and amphibians, and only appears as a temporary embryonic structure in reptiles, birds, and mammals.proneurotensin(biochemistry) A precursor of the hormone neurotensinproneurotoxinAny material that is metabolised to become a neurotoxinproneurotrophinAny precursor to the production of a neurotrophinpronghornA North American mammal, Antilocapra americana, that resembles an antelope.pronociceptionA pronociceptive conditionpronominalisation(grammar) The replacement of a noun by a pronounpronominalization(grammar) The process of pronominalizing.pronoun(grammar) A type of word that refers anaphorically to a noun or noun phrase, but which cannot ordinarily be preceded by a determiner and rarely takes an attributive adjective.pronounciationMisspelling of pronunciation.pronunciation(countable) The formal or informal way in which a word is made to sound when spoken.prooemionA preface, an introduction.prooflisten(ambitransitive) To listen, usually to a recording, for errors.proopiomelanocortin(biochemistry) A precursor polypeptide involved in diverse cellular functions.propagandizationThe spreading of propaganda.propagationThe multiplication or natural increase in a population.propagon(physics) A vibrational mode that propagates as a plane wavepropagulationasexual reproduction via propagulespropalation(rare) disclosure, revelationpropargylation(organic chemistry) Reaction with the triple bond of a propargyl grouppropelargonidinAny of a class of condensed tannins formed from epiafzelechin, which yield pelargonidin when depolymerized under oxidative conditions.propension(archaic) Propensity.propepsin(archaic, biochemistry) pepsinogenproperation(obsolete, rare) haste; hurrying.properdin(biochemistry) A protein in human serum that complements part of the immune systemproperispomenon(linguistics, of a word) In Greek grammar, having a circumflex accent on the penultimate syllable.propertarianOne who endorses propertarianism.propertizationThe process of coming to treat something as if it were property under the lawpropfan(aviation) A modified turbofan jet engine with the propeller outside the engine duct of an aircraft.prophalloin(biochemistry) A toxic cyclic peptide obtained from the mushroom Amanita phalloidesprophanationObsolete form of profanation.prophetizationThe act or process of presenting someone as a prophet, or something as prophetic wisdom.prophyrinMisspelling of porphyrin.propicillin(pharmacology) A penicillin.propikacin(pharmacology) An aminoglycoside antibiotic.propilin(biochemistry) A polypeptide that is a precursor of pilinpropination(historical) The right to distill spirits.propiomelanocortinMisspelling of proopiomelanocortin.propionylation(organic chemistry) The reaction of a substance with propionic acid or one of its derivatives; the introduction of one or more propionyl groups into a substancepropionylphenetidinAn analgesic, hypnotic, and antipyretic agent in fine whitish crystals, soluble in alcohol and ether and insoluble in water.propitiationThe act of propitiating; placation, atonement, similar to expiation but also involving the appeasement of anger.propleuronThe lateral sclerite of the anterior division of the thorax of an insectpropman(theater) A man responsible for looking after the props in a theaterpropodeonAlternative form of propodeum (“abdominal segment in bees etc.”).propogationMisspelling of propagation.propolisationAlternative form of propolization.propolizationThe process of propolizing.proportion(countable) A quantity of something that is part of the whole amount or number.proposition(uncountable) The act of offering (an idea) for consideration.propositionalization(computing) The transformation of a relational dataset into a propositional one.proprialisationAlternative spelling of proprialization.proprialization(linguistics) The process of a common noun becoming a proper name or a common adjective becoming a proper adjective.proprietarian(China) A person who owns property (a proprietor) or believes in proprietarianism, that is, that property is an absolute right.proprioceptionThe sense of the position of parts of the body, relative to other neighbouring parts of the body.proprotein(biochemistry) Any protein that is cleaved by a convertase to form a smaller protein or biologically-active polypeptide.proptoporphyrinMisspelling of protoporphyrin.propugn(obsolete, transitive) To fight for, defend, or contend for somethingpropugnation(obsolete) means of defence; defencepropulsation(obsolete) The act of driving away or repelling; a keeping at a distance.propulsionThe process of propelling, driving, or pushing, typically forward or onward; a propulsive force or impulse.propwoman(theater) A woman responsible for looking after the props in a theaterpropylaeon(historical contexts, especially Ancient Greece and Ancient Rome) Alternative form of propylaeum.propylitization(geology) The alteration of minerals and ores at low temperature and pressurepropylon(architecture, historical) Alternative spelling of propylaeum.propylparabenThe n-propyl ester of p-hydroxybenzoic acid, used as a preservative.proration(telecommunications) In a telephone switching center, the distribution or allocation of equipment or components proportionally among a number of functions, to provide a requisite grade of service.proregressionA combination of progression and regression, cancelling each other out and leading to stasis.prorenin(biochemistry) A precursor of reninprorogationCausing something to last longer or remain in effect longer; prolongation, continuance.proruptionThe act or state of bursting forth; a bursting out.prosapogenin(organic chemistry) The aglycone of a saponinprosaposin(biochemistry) A glycoprotein that is a precursor for saposins A, B, C, and D.proscillaridinA cardiac glycoside of the bufanolide type.proscriptionA prohibition.prosecretin(biochemistry) A precursor to secretin, activated by gastric acidprosectionAn anatomical dissection carried out by an experienced anatomist as a demonstration for others.prosecutionThe act of prosecuting a scheme or endeavor.proselytisationAlternative spelling of proselytization.proselytizationThe act or process of proselytizing.proseman(archaic) A male writer of prose.prosencephalon(neuroanatomy) The forebrain.prosificationThe process of prosifying.prosignAny of a set of special sequences in Morse code used as control characters and punctuation.prosimianOf or from the prosimian suborder of primates.prosiphon(zoology) A minute tube found in the protoconch of ammonites, not connected with the true siphon.proskynetarion(Eastern Orthodoxy) an object of religious reverenceproskynitarion(orthodox Christianity) Alternative form of proskynetarion.prosodification(linguistics) The imposition of prosodic structure (e.g. syllables, feet, stress, etc.) onto string of segments (i.e. sounds such as consonants and vowels)prosodion(Ancient Greece) A processional hymn.prosomatostatin(biochemistry) A statin that is associated with diabetes and coronary diseaseprosopon(theology) The self-manifestation of an individual.prospection(uncommon) The action of looking forward into the future. Formed by analogy with retrospection.prostacyclin(organic chemistry) A prostaglandin produced in the walls of blood vessels; it acts as a vasodilator and inhibits the aggregation of plateletsprostaglandin(biochemistry) Any of a group of naturally occurring lipids derived from the C₂₀ acid prostanoic acid; they have a number of physiological functions and may be considered to be hormones.prostasin(biochemistry) A particular protein that is implicated in epithelial sodium channel regulation.prostatinSynonym of pravastatin.prostein(biochemistry) A protein that is expressed in the cytoplasm of benign and malignant prostate cellsprosternation(obsolete) dejection; depressionprosthetician(medicine) one who fits prosthesesprosthion(anatomy) The most anterior point of the upper alveolar processprostitutionEngaging in sexual activity with another person for pay.prostratin(organic chemistry) A phorbol that acts as an activator for a protein kinase.prostrationThe act or condition of prostrating oneself (lying face-down), as a sign of humility.prosumption(sociology) The contribution to product development by end users.protacadherinAlternative form of protocadherin.protacanthopterygian(zoology) Of or from the superorder Protacanthopterygii of ray-finned fish.protachykinin(biochemistry) A peptide isolated from pheochromocytoma tissue.protagon(biochemistry) A supposed crystalline molecule that forms the brain. The idea was proposed by Matthias Eugen Oscar Liebreich and Johann Ludwig Wilhelm Thudichum later disproved it, showing that the brain contains various lipids.protaminAlternative form of protamine.protamination(biology) The formation of protamines during spermatogenesisprotaminizationThe process of protaminizingprotanA person who has protanomalyprotantheanAny sea anemone of the suborder ProtanthaeaproteanExceedingly variable; readily assuming different shapes or forms.protectin(biochemistry) A membrane-bound protein that prevents lysis by complementprotectionThe process of keeping (something or someone) safe.protectorian(archaic) Synonym of protectoral.protegrin(biochemistry) Any of a family of polypeptides, first discovered in porcine leukocytes, that have antimicrobial activityprotein(nutrition, countable) A food rich in protein, often a meat or meat substitute.protelean(biology) Describes an organism that begins as a parasite but emerges as a free-living adultprotensionA drawing out; extension; stretching; duration.protention(philosophy) An anticipation of a future eventproteoaminoglycanA proteoglycan composed of aminosugar moietiesproteocephalideanAny tapeworm of the order ProteocephalideaproteoglucanAny proteoglycan in which the sugar moiety is glucoseproteoglycan(biochemistry) Any of many glycoproteins that have heteropolysaccharide side chainsproteoheparan(biochemistry) A complex of protein and heparan (always as a sulphate)proteolipoproteinSynonym of proteolipid.proteon(physics) Any composite particle composed of two fermionsproteophosphoglycan(biochemistry) A complex of a protein and a phosphoglycanproteorhodopsin(biochemistry) Any of several proteins, found in marine bacteria, that are light-dependent proton pumps.proteotoxinA protein that produces proteotoxicityproterochampsianAny extinct reptile of the clade †ProterochampsiaproterosuchianRelating to the proterosuchidsprotestationA formal solemn objection or other declaration.prothalamion(literary) A song or poem in honour of a bride and bridegroom about to be married.protheticianArchaic form of prosthetician.prothrombin(biochemistry) A glycoprotein, produced in the liver, that is converted into thrombin during bleeding and subsequent clotting.prothrombinogenSynonym of proconvertin.prothymosin(biochemistry) Any precursor of a thymosin polypeptideprotirelin(pharmacology) Thyrotropin-releasing hormone.protistanOf or pertaining to the protists.protistianAlternative form of protistan.protiston(zoology, archaic) A protist (member of the former taxonomic kingdom Protista).protoanemonin(biochemistry) A toxin found in all plants of the buttercup family (Ranunculaceae), produced by an enzymatic process from the glucoside ranunculin.protoaspidistrinA particular steroid glycoside.protocadherin(biology) Any of several polypeptides that are fragments of cadherinprotocephalonThe basic embryonic head of an anthropod.protoceratopsianSynonym of protoceratopsid.protocerebronMisspelling of protocerebrum.protochelin(organic chemistry) A tris(catecholamide) siderophore present in the bacterium Azotobacter vinelandiiprotocitizenA person whose social status is an early approximation to the later idea of a citizen.protococcidianAny protozoan of the order ProtococcidioridaprotocolizationnotarizationprotocollagenA form of collagen prior to its hydroxylationprotoconversationAn interaction between an adult (typically a mother) and baby, that includes words, sounds and gestures, that attempts to convey meaning before the onset of language in the childprotocooperation(biology) The situation where two species interact with each other beneficially, without having a specific need to do so.protodeaconA highly ranked non-monastic deacon who has special privileges.protodeauration(chemistry) The activation of a gold-carbon bond prior to a deauration of an organic compoundprotodeboronation(organic chemistry) The (selective) removal of a boronic group to return a compound to its original state; used especially to separate different isomers or enantiomersprotodioscinA steroidal saponin compound found in a number of plant species.protofibrillizationThe formation of protofibrilsprotoglobin(biochemistry) A simple globin, found in some archaea, that can bind oxygen and carbon monoxideprotoglycanMisspelling of proteoglycan.protogracillinA particular steroid glycoside.protohaeminAlternative spelling of protohemin.protohistorianOne who studies protohistory.protohumanPertaining to the first humans or the beginning of humankind.protohypericin(organic chemistry) A polycyclic derivative of hypericinprotoindustrializationAlternative form of proto-industrialization.protointron(genetics) A section of RNA that develops into an intronprotolexiconThe lexicon of a protolanguageprotomitochondrion(biology) The ancestral bacterial endosymbiont from which all mitochondria are thought to be derivedprotomodernOf an earlier style approaching what is now modern.proton(particle physics) A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark.protonation(chemistry) The addition of a proton (hydrogen ion) to an atom, molecule or ion, normally to generate a cation.protoneodioscinA particular steroid glycoside.protoneogracillinA particular steroid glycoside.protoneotokorinA particular steroid glycoside.protoneoyonogeninA particular steroid glycoside.protonization(chemistry) Synonym of protonation.protonymphon(biology) The larva of a sea spiderprotooncoprotein(biochemistry) Any protein that is converted to an oncoproteinprotopectinSynonym of pectose.protophenomenon(philosophy) A fundamental phenomenonprotophorinAlternative form of protoporphyrin.protophorphyrinogenMisspelling of protoporphyrinogen.protoporcelainAn early Chinese glazed stoneware, from the Han dynasty, that had some of the characteristics of true porcelain without its translucency.protoporphirinMisspelling of protoporphyrin.protoporphorinMisspelling of protoporphyrin.protoporphyrin(biochemistry) Any porphyrin that lacks a central metal ionprotoporphyrinogen(biochemistry) Any of several precursors in the biosynthesis of protoporphyrinprotorosaurianAlternative form of protorosaur.protosignSimple gestures that might eventually develop into a sign language system.protostomianOf or pertaining to the protostomesprotosuchianAny crocodyliform of the clade ProtosuchiaprotosunSynonym of protostar.protothecanAny alga of the genus Prototheca.prototherianBelonging or pertaining to the subclass Prototheria.prototokoroninA particular steroid glycoside.prototoxinAny substance that is converted into a toxinprototribestinA steroid glycoside found in Tribulus terrestris.protoxinA rudimentary toxinprotoyonogeninA particular steroid glycoside.protozoanOf, pertaining to, or characteristic of a protozoan.protozoon(cytology) A protozoan.protozooplankton(biology) protozoan planktonprotraction(uncountable) The condition of being protracted.protronMisspelling of proton.protropin(medicine) A polypeptide growth hormone secreted by the pituitary gland; a synthetic version used medicinallyprotrudin(biochemistry) A protein that induces neurite formationprotrusion(uncountable) The act of protruding.protuberation(rare) protuberanceproturanAny of many proto-insects, of the order Protura, that lack eyes and wings.protusionMisspelling of protrusion.prouisionObsolete typography of provision.prounion(politics) In favour of trade unions.provacationMisspelling of provocation.provaccinationAlternative form of pro-vaccination.provasopressinSynonym of copeptin.provection(linguistics) The carrying forward of a final consonant to a following word, as in "a nickname" from Middle English "an ekename".provenHaving been proved; having proved its value or truth.provincialisationAlternative form of provincialization.provincializationThe process of making something provincial.provirionA structure that develops into a virionprovisionAn item of goods or supplies, especially food, obtained for future use.provisionalizationThe act or process of provisionalizing.provitamin(biochemistry) Any biologically inactive compound that may be converted into a vitamin within an animal organismprovocationThe act of provoking, inciting or annoying someone into doing something.provulgationThe act of publishing, making known, promulgation.prowomanAlternative form of pro-woman.proxigeanRelating to the proxigee.proximalisationAlternative form of proximalization.proximalizationThe process, or the result of proximalizingproxiredoxinMisspelling of peroxiredoxin.proxorphan(pharmacology) An opioid analgesic and antitussive drug of the morphinan family.prozostrodontianAny cynodont of the clade ProzostrodontiapruanObsolete form of prune (“dried plum”).prudification(rare) The increase of excessive propriety on matters related to sex.prulaurasin(organic chemistry) A glycoside found in cherry laurel leaves.prulifloxacin(pharmacology) A synthetic chemotherapeutic antibiotic of the fluoroquinolone class.prunasin(biochemistry) A cyanogenic glucoside related to amygdalin, found in Prunus species.prunetin(organic chemistry) An O-methylated isoflavone originally found in the bark of Prunus emarginata, the Oregon cherry.prunin(organic chemistry) A glucoside of naringenin found in dormant buds of citrus plants.prunitrin(organic chemistry) The glycoside of prunetin.pruriceptionThe sensation of itchingpruritoception(pathology) itching, especially as a result of a skin conditionpruritogenAny substance that causes pruritus (itching).prustenA sound made by tigers and snow leopards without the intent to threaten, producing a breathy snort by blowing through the nostrils whilst the mouth is closed — a low-frequency equivalent of the purring found in domestic cats.pruvanserinA selective 5-HT2A receptor antagonist investigated as an insomnia treatment.pryan(Cornwall, originally mining) A soft, white clay.prymnesin(organic chemistry) Any of a class of phycotoxins produced by the alga Prymnesium parvum, also toxic to fish.psalmodicon(music) A simple zither-like single-stringed chordophone (stringed instrument), played with a bow, of Scandinavian origin.psalmodikonAlternative spelling of psalmodicon.psalmotoxinAny of a group of toxins in the venum of tarantulas of the genus PsalmopoeuspsalterianRelating to a psalter; musical.psalterion(now historical, rare) Synonym of psaltery.psammaplinAny of a group of cytotoxic bromotyrosine phenols (e.g. N,N"-(dithiodi-2,1-ethanediyl)bis[3-bromo-4-hydroxy-a-(hydroxyimino)-benzenepropanamide) found in some marine spongespsammon(ecology) The community of organisms living in the sandy, moist habitat along a shoreline.pseudapistosianAny phaegopterine moth in the genus Pseudapistosia.pseudisodomon(architecture) An early style of masonry used by the Greeks, in which the courses have differing height, length, or thickness of stones, though the stones in any one course are alike.pseudizationThe calculation of a pseudopotentialpseudoabelianAlmost abelian.pseudoacromionA lateral scapular ridge on nodosaurid ankylosaurspseudoadaptation(biology) The apparent adaptation of an organism to a changed environment that is however accompanied by excessive stress that causes later pathological change.pseudoaddiction(medicine) A purported condition resembling drug addiction but caused by underprescription of drugs to treat pain in the patient, causing them to seek more.pseudoalignTo undergo pseudoalignmentpseudoalterin(biochemistry) A metalloprotease isolated from deep-sea bacteria of a Pseudoalteromonas species.pseudoanonymizationAlternative form of pseudonymization.pseudoapproximation(mathematics) An approximation where the error of approximation is greater than ε because calculation of a true approximation is not feasible.pseudoarticulationA rudimentary joint formed from a bony protrusionpseudoazurin(biochemistry) Synonym of cupredoxin.pseudobaptigeninAn isoflavone found in Trifolium pratense (red clover).pseudocephalonAn extension of the first segment of the thorax of an insect larvapseudochitinSynonym of tectin.pseudocolonizationSomething which resembles or appears to be colonization (in various senses), but is really not.pseudocolumn(databases) A column that yields a value when selected, but is not an actual column of the table.pseudocopulation(biology) Any of various processes, amongst diverse animals, in which male gametes are passed from one individual to another without sexual union.pseudocorrelation(mathematics) An approximation to a cross-correlation made using Monte Carlo methodspseudocotyledon(botany) Synonym of proembryo (“cluster of cells that has not yet formed into an embryo”).pseudodentitionThe set of pseudoteeth of an animalpseudodepression(medicine) The signs and symptoms of depression from a non-depressive, often organic aetiology.pseudodiffusionmixing due to the action neighbouring motion rather than true diffusionpseudodimension(mathematics) The largest cardinality (or infinite) of a set of points (in a function class) that can be shattered.pseudodipteron(architecture) A pseudodipteral structurepseudodistomin(organic chemistry) Any of a class of piperidine alkaloids isolated from tunicates of genus Pseudodistoma.pseudodivision(mathematics) Any of several methods of division that employ addition and shifting of digits.pseudodragon(fantasy) A small dragon-like creature, not a true dragon.pseudoelection(politics) A sham election; an election organized without any significant political choice or real impact on the results, often held in dictatorial regimes to feign the appearance of public legitimacy.pseudoepipleuronA false epipleuronpseudoequalitarianApparently, but not actually, equalitarian.pseudoexacerbation(medicine) A sudden relapse in cases of multiple sclerosis, brought on by certain factors such as elevated temperature.pseudoexfoliation(pathology) A form of exfoliation, especially in the eyes, in which the surface layer is not actually detached.pseudoexon(genetics) A sequence of nucleic acid bases that has the characteristics of an exon but takes no part in the splicing of genes.pseudoexonizationThe formation of a pseudoexonpseudoextinctionphyletic extinction; the situation where all members of a species are extinct, but members of a daughter species remain alivepseudofactinA particular biosurfactant obtained from Pseudomonas fluorescens. It is a novel cyclic lipopeptide biosurfactant. As a surface-active compound it has potential to be broadly used in medicine (anti-cancer and anti-bacterial properties), cosmetics and industry.pseudofermion(physics) A form of fermion that has integer spinpseudofictionWriting that resembles fiction but lacks key attributes of fiction; for example, an autobiographical novelpseudofilamentationThe growth of pseudofilamentspseudofunctionalization(genetics) A deleterious mutation that does not actually add functionpseudofusionThe situation in which the heart rate becomes indistinguishable from that of an implanted pacemakerpseudoganglionA localized thickening of the main part or trunk of a nerve, resembling a ganglion but having only nerve fibres and no nerve cells.pseudogenationThe formation of pseudogenespseudogenisationAlternative form of pseudogenization.pseudogenization(genetics) The conversion of a gene into a pseudogene.pseudograinSynonym of pseudocereal.pseudogravitation(rare) Synonym of pseudogravity (“artifical gravity”).pseudohallucination(psychiatry) A brief but vivid visual or auditory experience that is recognised by the experiencer as being unreal.pseudohalogen(chemistry) A binary inorganic compound with a structure similar to that of the interhalogens but containing at least one non-halogen radical such as cyanidepseudohamiltonian(physics) A generalization of a pseudopotential, where in addition to changing the potential the mass is varied to achieve the desired properties of the valence states.pseudohermitian(mathematics) Having the Hermitian properties except that the eigenvalues may be complex and the eigenvectors need not be orthogonal.pseudoherniationThe formation of a pseudohernia.pseudohexagonA shape that is approximately a hexagonpseudohistorianA would-be historian who deals in pseudohistory.pseudohumanApparently, but not actually, human.pseudohypericin(organic chemistry) An aromatic polycyclic dione closely related to hypericin.pseudohypertension(medicine) A falsely elevated blood pressure or blood pressure reading, often as a result of age-related arterial stiffness.pseudoindican(dated) iridoidpseudoinfarction(cardiology) Any condition which imitates the characteristics of an acute myocardial infarction, especially in its pattern on an electrocardiogram.pseudoinfection(pathology) The presence of pathogenic microorganisms in a host without an actual infectionpseudoinstruction(programming) A command that resembles, but is not in fact, a machine instruction, such as a special directive or a command that is mapped to a sequence of real instructions.pseudointeractionAn apparent interactionpseudointersection(mathematics) A set for which the number of elements that are not in the intersection (of two infinite sets) is finite.pseudoinvasion(pathology) An apparent invasion (of carcinomas)pseudoinversion(mathematics) An operation that approximates an inversion; A reversal of the ends while maintaining a constant central region.pseudojujubogenin(organic chemistry) A sapogenin present in the water hyssop Bacopa monnierapseudolesbianAlternative spelling of pseudo-lesbian.pseudolesionA condition that appears to be a lesion but is, in fact, a developmental abnormality.pseudoliberationFalse liberation; The process or instance of appearing to be liberation while not actually liberating.pseudolinearizationA pseudolinear approximation of a nonlinear system.pseudoloanAlternative form of pseudo-loan.pseudolysin(biochemistry) A peptidase enzyme that has the characteristics of a lysinpseudolysogenA phage that undergoes pseudolysogenypseudomedian(statistics) A measure of centrality for data sets and populations, which agrees with the median where the data are symmetric.pseudomenstruation(medicine) Uterine bleeding, or blood-tinged vaginal discharge, that resembles menstruation but is not associated with the typical endometrial changes thereof.pseudomodernApparently, but not actually, modern.pseudomucinSynonym of metalbumin.pseudomultiplication(mathematics) Any of several methods of multiplication that employ addition and shifting of digitspseudomureinSynonym of pseudopeptidoglycan.pseudomycinAny of a class of peptide antimycotics isolated from Pseudomonas syringae.pseudonation(politics) An entity that falsely purports or is purported to be a nation.pseudonizationMisspelling of pseudogenization.pseudonormalisationAlternative form of pseudonormalization.pseudonormalizationThe process of becoming pseudonormal, such as (usually, more specifically):pseudonutritionpseudoscientific dietary practicespseudonymisationAlternative spelling of pseudonymization.pseudonymization(computing, law) The replacement of all data (in a database etc) that identifies a person with an artificial identifier or pseudonym.pseudoobstruction(pathology) Any of several conditions that prevent passage through the intestines / bowels without a physical obstructionpseudoparasitisationinfestation with pseudoparasitespseudoparasitizationAlternative form of pseudoparasitisation.pseudopeptidoglycanA major cell wall component of some archaea that differs from bacterial peptidoglycan in chemical structure, but resembles eubacterial peptidoglycan in morphology, function, and physical structure.pseudophosphorylation(organic chemistry) Any modification of a protein that has a similar effect as phosphorylationpseudophyllideanRelating to flatworms of the order Pseudophyllideapseudopilin(biochemistry) A form of pilin that lacks disulfide bonds between its foldspseudoplanktonAny plankton that lacks buoyancy and so attaches itself to a floating object.pseudopodianAlternative form of pseudopodial.pseudopolyanion(chemistry) Any polymer that becomes anionic in the presence of a suitable electrolytepseudopopulation(statistics) A subset of a population used in simulationspseudoprecisionA spurious appearance of precision, as for example when an inaccurate figure is given to very many decimal places.pseudoprofessionA job that is not considered a true profession, but has many characteristics of a professionpseudoprogression(medicine) Apparent progression following treatmentpseudoproposition(philosophy, logic) A spurious or meaningless propositionpseudoproteinA man-made polypeptide that has some properties of a proteinpseudoprotodioscinA particular steroid glycoside.pseudoqueenA bee that temporarily takes over the role of a lost or dead queenpseudorandomisationAlternative form of pseudorandomization.pseudorandomizationThe generation of pseudorandom valuespseudoreactionAn apparent reaction (to a medical test etc.) that does not in fact represent a positive test result.pseudorecollection(psychology) A false memory.pseudorecombination(genetics) The exchange of nucleic acid between two organisms (typically viruses)pseudoreductionSomething that resembles a reduction but is not a true reduction.pseudoreligion(chiefly derogatory) Non-mainstream belief or philosophy with certain aspects of religion (a founder, a principal text, faith-based beliefs, etc.).pseudoreplication(statistics, especially in, biology, ecology) The exaggeration of the statistical significance of a set of measurements resulting from treating the data as independent observations when they are in fact interdependent.pseudorepresentation(mathematics) Given a group G and a commutative ring R, a tuple of maps (a,d,x), where a,d:G→R and x:GxG→R, are a pseudorepresentation if they satisfy the relations one would expect if a(g) and d(g) were the diagonal entries of a two dimensional representation |a(g)b(g)|\|c(g)d(g)| and if x was given by x(g,g^′)=b(g)c(g^′).pseudoreversion(genetics) The reversion of a mutation in which the products are different from the originalspseudorevolutionA political event resembling, but not actually, a revolution.pseudorhombicuboctahedron(geometry) Geometric figure closely related to the rhombicuboctahedron, but differing in the arrangement of its faces; specifically, a Johnson solid-like variation or misclassification sometimes used informally to describe a non-uniform or distorted form of a rhombicuboctahedron where symmetry is altered.pseudoriparianthat is close or similar to riparianpseudorotation(chemistry) A form of stereoisomerization that appears to have been produced by rotation of a moleculepseudoscorpianMisspelling of pseudoscorpion.pseudoscorpionAn arachnid belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethidapseudosegmentation(biology) Apparent segmentation, typically of a nematode, by the formation of a series of rings on the body.pseudosiphonAny structure that has the appearance of the siphon of a molluscpseudosolutionA suspension or colloid that has very small particles.pseudosophisticationA false sophistication.pseudospeciationThe formation of self-contained groups (typically of humans) that have different language, customs or other social grouping.pseudospin(physics) A quantum degree of freedom analogous to spinpseudostellarin(organic chemistry) Any of several cyclic peptides obtained from plants of the genus Pseudostellaria, many of which have biological activitypseudostratificationThe property of being pseudostratified.pseudosuchian(zoology) Belonging to the Pseudosuchia.pseudosylvian(anatomy) Describing an extension of the lateral sulcus on each hemisphere of the brainpseudotanninAny of a diverse group of low-molecular weight compounds (such as gallic acid) that have some similarities to the tanninspseudotransduction(genetics) The appearance of transduction in an experiment as a result of the use of impure virusespseudotriangulation(mathematics) The partitioning of the plane into pseudotrianglespseudotrypsin(biochemistry) A proteoform of trypsinpseudouridimycin(medicine) An antibiotic active against bacterial RNA polymerasepseudouridinylationAlternative form of pseudouridylation.pseudouridylation(biochemistry) The addition of one or more pseudouridine moietiespseudoveinAn apparent vein seen on an X-ray image due to hemorrhagepseudovirgin(entomology) A female of certain species that has mated but has not received sperm.pseudovirion(virology) A synthetic viral particle that cannot replicate, used to inject foreign nucleic acid into a cell.pseudovitaminA vitamin-like analogue that is biologically inactive in humans.pseudowavefunctionA simplified approximation of an electron's wavefunction.pseurotin(organic chemistry) Any of a class of heterospirocyclic metabolites produced by Pseudeurotium ovalispsilocerataceanAny ammonoid cephalopod of the superfamily Psilocerataceae.psilocin4-hydroxy-dimethyltryptamine, a hallucinogenic alkaloid found in most psychedelic mushrooms.psilocybin(biochemistry) A hallucinogenic alkaloid, C₁₂H₁₅N₂O·H₂PO₃, present in several species of Central American mushroom and producing effects similar to LSD. The prodrug of psilocin.psilocynAlternative form of psilocin.psilostachyin(organic chemistry) Any of a group of bioactive isolates of Ambrosia psilostachya.psionThe psi-meson, a sub-atomic particle.psittacofulvinA type of yellow pigment found in the feathers of parrotspsocopteranAny insect of the order Psocoptera.psoralen(medicine) Any of a group of furanocoumarins, from the seeds of various plants, that are used to treat psoriasis, eczema and vitiligo.psoriasin(biochemistry) An inflammatory calcium-binding protein found on human skinpsychiatrisationNon-Oxford British English standard spelling of psychiatrization.psychiatrizationThe act or process of psychiatrizing.psychoacousticianAn expert in psychoacoustics.psychoactivationactivation by a psychoactive substancepsychocivilizationCivilization constructed according to psychological notions.psychoclinicianA clinical practitioner of psychology.psychodegradationdegradation of mental capacitypsychoeducationEducation given to people who have, or have to deal with, psychological disturbances.psychogeriatrician(medicine) A psychiatrist subspecialising in the assessment and treatment of elderly people.psychohistorianOne who is involved in the field of psychohistory.psychojargon(rare) psychobabblepsychologizationPsychological analysis or interpretation.psychomanipulationThe intentional manipulation of a person's psychological state.psychometrician(psychology) A person who administers psychometric tests.psychonA hypothetical unit of consciousness.psychoplastogen(medicine, psychiatry, organic chemistry) Any of a group of small molecule drugs (notably including some psychedelics) that produce rapid and long-lasting effects on neuronal structure and function and whose use is intended to produce therapeutic benefit after a single dose.psychorubin(organic chemistry) A cytotoxic naphthoquinone obtained from Psychotria rubra.psychosomaticianA psychosomaticist: a specialist in psychosomatic disorders.psychosomatizationThe development of psychosomatic illness.psychostimulationThe action or result of a psychostimulantpsychosurgeonOne who carries out psychosurgery.psychotechnicianA practitioner of psychotechnology.psychotizationThe process of making psychotic.psychotraumatization(psychology) Psychological traumatization.ptaeroxylin(organic chemistry) A particular oxepinochromone.ptarmiganAny of three species of small grouse in the genus Lagopus found in subarctic tundra areas of North America and Eurasia.ptenoglossan(zoology) Any sea snail of the clade Ptenoglossa.pteranodonA member of Pteranodon, a genus of large pterosaurs, the males of which had a bony crest on the back of the head.pteranodontianAny ornithocheiroid pterosaur of the clade PteranodontiapteridinAny erniettomorph of the genus Pteridiniumpterin(organic chemistry) A ketonic amide derivative of pteridine responsible for some of the colouring in nature. It is also a component of folic acid.pterioideanAny bivalve mollusc of the superfamily PterioideapteriomorphianAny bivalve mollusc of the subclass Pteriomorphiapterion(anatomy) The point corresponding with the posterior end of the sphenoparietal suture; known as the weakest part of the skull.pterocarpan(organic chemistry) Any of various isoflavonoid derivatives found in the Fabaceae familypterocarpinA pterocarpan, 3-methoxy-8,9-methylenedioxypterocarpan, present in camwoodpteron(architecture) A peristyle raised on a podium, differing from an ordinary peristyle raised only on a stylobate.pteropleuron(entomology) Synonym of anepimeron.pteropsinA non-visual opsin present in some winged insectspterorhodinA red pigment in the melanophores of tree frogs.pterosaurianOf, like, or pertaining to a pterosaur.pterosin(organic chemistry) Any of a group of indanone derivatives present in bracken of the genus Pteridium.pterygopalatinMisspelling of pterygopalatine.pterygostomianAlternative form of pterygostomial.ptiloerection(ornithology) Fluffing up of feathers or down so that birds can control heat.ptisanAlternative spelling of tisane.ptomainAlternative form of ptomaine.ptyalin(biochemistry) A form of amylase found in saliva that breaks down starch into maltose and dextrin.ptychodacteanAny sea anemone of the suborder PtychodacteaepubesceninA particular steroid glycoside.publican(Commonwealth, by extension) The manager or owner of a hotel.publicationThe act of publishing printed or other matter.publicizationThe act of publicizingpublickationObsolete spelling of publication.publificationMaking public, for or to be used by the people or community.puccoon(uncountable) The red pigment (dye) obtained from these plants.puceron(dated) Any of a number of plant live, or aphids.puckaun(Ireland) A he-goat.pudden(dialect) puddingpuebloizationThe process or resulting of puebloizing; conversion into a pueblo.puerarin(organic chemistry) A glucoside of daidzein found in the roots of kudzupuerilization(rare) The act or process of acquiring puerile characteristics.puffcornA corn snack, visually similar to popcorn, but made with corn meal and baked.puffin(now obsolete) The young of the Manx shearwater (Puffinus puffinus), especially eaten as food.puftaloon(Australia) A fried scone-like fritter originally from Australia.pugeranianA dog that is a cross between a pug and a Pomeranian.pukestain(derogatory, slang) A term of abuse.pulasanThe fruit of the tropical tree Nephelium ramboutan-ake (syn. N. mutabile)pulcherriminA bacterial pigment that is an iron chelate of pulcherriminic acidpuldronAlternative form of pauldron.pulldownAlternative form of pull-down.pullen(obsolete) domestic fowl; poultrypullin(obsolete) poultrypullulan(biochemistry) A glucan produced by some fungi and used in manufacturing edible films.pullulationA teeming, swarming, or multiplying.pulpatoon(historical) A fruit or meat pie with the crust made of forcemeat.pulpificationThe process of pulpifying.pulsationThe regular throbbing of the heart, an artery etc. in a living body; the pulse.pulsetrain(physics) A series of more or less regular pulses.pulsion(now rare) The act of driving forward; propulsion.pultanAlternative form of puttun (“Indian regiment”).pultonAlternative form of puttun (“Indian regiment”).pultoonAlternative form of puttun (“Indian regiment”).pultrusionA continuous process for manufacture of composite materials with constant cross section.pultunAlternative form of puttun (“Indian regiment”).pulutan(Philippines) finger foodpulverinAlternative form of pulverine.pulverisationAlternative spelling of pulverization.pulverizationThe act of pulverizing.pumiliotoxinAny of a class of toxins present in the skin of poison dart frogspumpgun(firearms, informal) A pump-action firearm.pumpion(archaic) Pumpkin.pumpkinA domesticated plant, in species Cucurbita pepo, similar in growth pattern, foliage, flower, and fruit to the squash or melon.pumpkinificationThe act of turning into a pumpkin; usually in jocular opposition to deification.pumpmanA man employed to operate a pump, as in a mine.pumpsmanAlternative form of pumpman.pun(transitive, obsolete) To beat; strike with force; to ram; to pound, as in a mortar; reduce to powder, to pulverize.punaglandin(organic chemistry) Any of a group of chlorinated prostaglandin present in some octocoralspunaluanOf or relating to a punalua.punchdown(telecommunications) A kind of electrical connection often used in telephony, having solid copper wires that are punched down into short open-ended slots which are a type of insulation-displacement connector. The slots contain blades which cut through the wire's insulation as it is punched down, and hold the wire in position while making electrical contact.puncheonA figured stamp, die, or punch, used by goldsmiths, cutlers, etc.punchinObsolete spelling of puncheon.punchionAlternative form of puncheon.punctationA preliminary treaty or contract.punction(obsolete) A puncture or pricking.punctualisationNon-Oxford British English standard spelling of punctualization.punctualizationThe act of punctualizing; an instance of punctualizing.punctuationAn act of punctuating.punctulationThe quality of being punctulate.puncturationThe act or process of puncturing.pungenin(organic chemistry) A phenolic glycoside present in Picea pungenspunicacortein(organic chemistry) A particular ellagitannin.punicafolin(organic chemistry) An ellagitannin found in the leaves of Punica granatum (pomegranate) and in Phyllanthus emblica (Indian gooseberry).punicalagin(organic chemistry) A particular class of ellagitanninspunicalginMisspelling of punicalagin.punicalin(organic chemistry) A particular ellagitanninpunicin(organic chemistry) Synonym of pelargonin.puniglandinMisspelling of punaglandin.punition(obsolete) punishmentpunkin(dialectal) Nonstandard form of pumpkin.puntilion(obsolete, glassblowing) A pontil.puntmanA boatman who uses a punt.puntsmanAlternative form of puntman.pupariationThe formation of a puparium.pupationThe act or process of pupating.pupilloconstrictionconstriction of the pupil of the eye (typically in response to light)pupinization(historical) The use of the Pupin system to extend the range of long-distance telephone communication.puplicanObsolete spelling of publican.puppetmanA puppeteer, especially a master of a puppet show.puptonAlternative form of pulpatoon.puputan(now historical) A suicidal march towards an enemy as carried out by the aristocracy or ruling class of a Balinese kingdom.pupylation(biochemistry) The conjugation of the PUP protein to the amino groups of lysine amino acids in target proteinspurdahnashinA woman who observes purdah (segregation of the sexes).purdonianAlternative form of purdonium (“coal scuttle”).purgationThe process or act of purging, such as by the use of a purgative.purgatorianOne who holds to the doctrine of purgatory.purgen(proprietary name, obsolete) A preparation of phenolphthalein, employed as a laxative.purificationThe act or process of purifying; the removal of impurities.purination(organic chemistry) Reaction with, or conversion to a purinepuritan(usually derogatory) A puritanical person.puriteen(Internet slang, derogatory) A teenager or young adult (especially an LGBTQ or LGBTQ-supportive member of Gen Z) whose views on sexuality are seen as sex-negative or moralistic.puritogenMisspelling of pruritogen.purlieuman(historical) An owner of lands in the purlieu.purlinA longitudinal structural member bridging two or more rafters of a roof.purloin(transitive, usually formal or humorous) To take the property of another, often in breach of trust; to appropriate wrongfully; to steal.puromycin(pharmacology) An antibiotic that is a strong inhibitor of protein translation.puromycylationTreatment with puromycinpurothionin(biochemistry) Any of a group of toxic cross-linked cyclic oligopeptidespurotoxinAny of a group of toxins present in venom of spiders of genus Geolycosa.purpninA particular steroid glycoside.purpogallinMisspelling of purpurogallin.purportionMisspelling of proportion.purproninA particular steroid glycoside.purpurinA red anthraquinone dye, extracted from madder, that is used as a biological stainpurpurogallinA red crystalline compound, the aglycon of several glycosides from nutgalls and oak barks.purpuromycinAn antibiotic isolated from Actinoplanes ianthinogenes.purpuroxanthin(organic chemistry) 1,3-dihydroxyanthraquinonepurslainArchaic spelling of purslane.pushbuttonAlternative spelling of push-button.pushdown(computing) Describing a stack in which items are removed in a LIFO manner from the end at which they were added.pusherman(US, slang) A drug dealer.pushpin(transitive) To fasten with a thumbtack.pussification(slang, vulgar) The act or process of pussifying.pussyfication(vulgar, slang, derogatory) The process of making or becoming weaker, gentler, or less masculine.pussyificationAlternative form of pussyfication.pussyman(colloquial) A great male lover.pustulationThe act of producing pustules.putamen(botany) The shell of a nut; the stone of a drupe fruit; endocarp.putation(obsolete) An act of considering; estimation.putchaminObsolete spelling of persimmon.putcheonA wire trap for catching salmon.putdownAlternative form of put-down.putidaredoxin(biochemistry) An adrenodoxin produced by Pseudomonas putidaputinisation(politics, British spelling) The taking over of power utilizing allegedly undemocratic means.putinization(American spelling) Alternative spelling of putinisation.putrefactionRotten material.putresceinMisspelling of putrescine.putrescinAlternative spelling of putrescine.putrifactionObsolete spelling of putrefaction.putrification(archaic) putrefactionputten(Yorkshire, Lancashire, West Country dialect) past participle of putputtun(India, archaic) A regiment.puwainaphycinAmy of a group of cytotoxic lipopeptides present in some cyanobacteriapuzzolanAlternative form of pozzolana.pwn(Internet slang, originally leetspeak) Triumph, victory. Often exclaimed after an opponent in a video game is defeated.pycnaspidean(dated, orithology, of birds or their tarsus) Having the posterior side of the tarsus covered with small irregular scales.pycnonAlternative spelling of pyknon.pycoerythrinMisspelling of phycoerythrin.pyelon(anatomy) Synonym of renal pelvis.pygian(rare) Pertaining to or resembling buttocks.pygmaeanArchaic form of pygmean.pygmalionOne who acts as the legendary Greek sculptor Pygmalion (who was granted the wish of having life given to a sculpture of his which he fell deeply in love with).pygmeanLike a pygmy; very small.pygostylianAny avialan of the clade Pygostylia, that has a pygostylepyin(biochemistry, dated) An albuminoid constituent of pus, related to mucin, possibly a mixture of substances rather than a single body.pyknonCondensation, density.pylonA gateway to the inner part of an Ancient Egyptian temple.pyochelinA particular siderophore, produced by Pseudomonas aeruginosa, that solubilizes ferric ironpyocianinMisspelling of pyocyanin.pyocinAny of a class of bacteriocins produced by Pseudomonas aeruginosa.pyocyanin(biochemistry) A greenish-blue pigment, produced by Pseudomonas aeruginosa, that is an antibiotic and antifungal agentpyoluteorinAn antimicrobial compound found in Pseudomonas.pyomelanin(organic chemistry) A pigment, related to melanin, that results from the catabolism of tyrosine and phenylalaninepyorubin(biochemistry) A red pigment produced by Pseudomonas aeruginosa.pyoverdin(biochemistry) Alternative form of pyoverdine.pyoxanthin(chemistry, obsolete) A yellow pigment isolated from Bacillus pyocyanicus.pyrabactinA synthetic sulfonamide, 4-bromo-N-(2-pyridinylmethyl)-1-naphthalenesulfonamide, that mimics the plant stress hormone abscisic acid.pyraclostrobinA particular fungicide used to control several plant pathogenspyramidalizationThe deformation of a trigonal planar molecule into a tetrahedral arrangement.pyramidionThe small pyramid which crowns or completes an obelisk or pyramid.pyramidisationAlternative form of pyramidization.pyramidizationThe process, or the result of pyramidizingpyramidon(pharmacology) A yellowish-white powder used as an antipyretic.pyran(organic chemistry) Any of a class of unsaturated heterocyclic compounds containing a ring of five carbon atoms, an oxygen atom and two double bonds; especially the simplest one, C₅H₆O.pyranoanthocyanin(organic chemistry) Any of a class of anthocyanin that develop in red wine during fermentationpyranocoumarin(organic chemistry) Any of a class of organic compound in which a pyran ring is fused to that of a coumarinpyranopterin(biochemistry) Any of several enzymatic cofactors containing a pterin coordinated to a metal ion via sulfur atomspyrazinAlternative form of pyrazine.pyrazoxyfenThe herbicide 2-[4-(2,4-dichlorobenzoyl)-1,3-dimethylpyrazol-5-yloxy]acetophenone.pyrethrin(organic chemistry) Any of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring.pyridomycinAn antibiotic that acts against mycobacteriapyridostatin(organic chemistry) The compound 4-(2-aminoethoxy)-N2,N6-bis(4-(2-aminoethoxy)quinolin-2-yl)pyridine-2,6-dicarboxamide that stabilizes the quadruplex form of DNApyridoxinAlternative form of pyridoxine.pyridoxylation(organic chemistry) reaction with a pyridoxyl grouppyridylamination(organic chemistry) Reaction with a pyridylamino grouppyrin(biochemistry) A protein that regulates the body's inflammatory response to trauma.pyrinuronA particular rodenticide.pyriproxyfenA pyridine-based pesticide effective against a variety of arthropods.pyritization(geology) The hydrothermal process whereby a rock is transformed into a pyrite.pyritohedron(mathematics) An irregular dodecahedron, the faces of which are identical but irregular pentagons.pyroanthocyanin(botany, organic chemistry) A type of anthocyanin found in Monnina obtusifolia.pyrobitumenAn amorphous fossilized petroleum mineraloid.pyrocarbonA ceramic form of carbon formed at high temperature from the breakdown of a hydrocarbon gaspyrocatechin(obsolete, organic chemistry) pyrocatecholpyrocollodionA smokeless powder, a variant of nitrocellulose.pyroconvectionConvection caused or intensified by a fire.pyroconversionA dry heat treatment of starch, causing dextrinization.pyrocottonNitrated cotton, a high explosive that is the main constituent of smokeless powder.pyrodin(dated, medicine) β-acetylphenylhydrazine when used as an antipyreticpyrogallein(organic chemistry) A poorly-characterised nitrogenous derivative of pyrogallolpyrogallin(dated, organic chemistry) pyrogallolpyrogasificationCombined pyrolysis and gasification.pyrogen(medicine) Any substance that produces fever, or a rise in body temperaturepyroglobulin(biochemistry) An immunoglobulin that coagulates when heatedpyroglutamination(organic chemistry) Reaction with pyroglutamate or other derivative of pyroglutamic acidpyroglutamylation(organic chemistry) Any reaction in which a pyroglutamyl group is added, typically by means of a derivative of pyroglutamic acidpyroglycerin(dated, organic chemistry) nitroglycerin; diglycerolpyrokininA neuropeptide that regulates some pheromones in some insectspyrolizationSynonym of pyrolysis.pyroninAlternative form of pyroninepyropheophytinAny of a group of substances, produced by heating chlorophyll, typically present in used olive oilpyrophosphorylation(chemistry) The act, or the result of pyrophosphorylatingpyroquilonA particular fungicide.pyroretin(obsolete, geology) A resinous form of asphaltpyrotechnianpyrotechnicianpyrotechnicianA person who designs or organises pyrotechnics.pyrotoxin(toxicology) Any of several pyrogenic bacterial toxins.pyrotron(physics) A magnetic mirror.pyrovidiconA pyroelectric vidicon.pyroxanthin(organic chemistry) A yellow, crystalline substance obtained from creosote etc; it seems to be a polycyclic aromatic hydrocarbon.pyroxanthogen(obsolete, organic chemistry) The component of wood tar from which pyroxanthin is obtainedpyroxylin(organic chemistry) A highly inflammable form of nitrocellulose; used in the manufacture of collodion and lacquers.pyrroindomycin(organic chemistry) Any of a group of antibiotics that have a spirotetramate structurepyruvin(organic chemistry) A poorly-characterised derivative of pyruvic acid formed by heating glycerol with tartaric acidpython(zoology) Any of the family Pythonidae of nonvenomous constrictor snakes.