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palaeodrainageA system of drainage channels cut by an ancient riverpalaeolatitudeBritish standard spelling of paleolatitude.palatoquadrate(biology) The dorsal part of the mandibular arch in some fishpaleocarbonateAncient carbonate, especially in ancient waterwayspaleolandscapeA landscape as it was in ancient timespaleolongitude(geology, paleontology) The former longitude of a particular geologic formation at a time in the geologic past, often specifically the time of formationpaleoshorelineAlternative spelling of palaeoshoreline.paleostructure(geology) ancient structurepaleotemperateThat was temperate in prehistoric timespalmatipartite(botany, of leaves) Having lobes with incisions that extend over half-way toward the petiole.palmitoleamide(organic chemistry) The amide of palmitoleic acidpanasqueiraite(mineralogy) A monoclinic-prismatic mineral containing calcium, fluorine, hydrogen, magnesium, oxygen, and phosphorus.pansusceptiblesusceptible to many different infectionspantothenamide(organic chemistry) Any amide of pantothenic acidpantoyllactone(organic chemistry) The lactone of pantoic acid.parachloralose(organic chemistry) A toxic isomer of chloralose with IUPAC name (1R)-1-[(2S,3aR,5R,6S,6aR)-6-hydroxy-2-(trichloromethyl)-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]ethane-1,2-diolparachrysotile(mineralogy) An orthorhombic polytype of chrysotile.paracoquimbite(mineralogy) A trigonal-rhombohedral light violet mineral containing hydrogen, iron, oxygen, and sulfur.paracryptodireAlternative form of paracryptodiran.paracyclophane(organic chemistry) Any cyclophane in which the aliphatic bridge connects the 1,4 (para) positions of the benzene ringparaherquamideAny of a class of mycotoxins obtained from Penicillium simplicissimumparajamesonite(mineralogy) An orthorhombic gray mineral containing antimony, iron, lead, and sulfur.parakeldyshite(mineralogy) A triclinic-pinacoidal mineral containing oxygen, silicon, sodium, and zirconium.paralaurionite(mineralogy) A monoclinic-prismatic mineral containing chlorine, hydrogen, lead, and oxygen.paraliteratureLiterature not thought of as literary, usually including comics, most genre fiction (such as fantasy and sci-fi), and pulp fiction.parallelisableAlternative form of parallelizable.parallelizableAble to be made parallel.paramelaconite(mineralogy) A tetragonal-ditetragonal dipyramidal black mineral containing copper and oxygen.paramethadioneAn oxazolidinedione anticonvulsant.parametrisableAlternative form of parametrizable.parametrizableThat can be parametrizedparamilitarizeTo change to a paramilitary system.paraphraseableAlternative spelling of paraphrasable.parapierrotite(mineralogy) A monoclinic-prismatic black mineral containing antimony, arsenic, sulfur, and thallium.pararobertsite(mineralogy) A monoclinic-prismatic mineral containing calcium, hydrogen, manganese, oxygen, and phosphorus.pararosaniline(organic chemistry) A basic magenta dye having a triphenylmethane structure.parasibirskite(mineralogy) A monoclinic-prismatic white mineral containing boron, calcium, hydrogen, and oxygen.parastratotype(geology) A stratotype designated by the original author alongside the holostratotype as an additional example of a stratigraphic unit.parasymplesite(mineralogy) A monoclinic-prismatic mineral containing arsenic, hydrogen, iron, and oxygen.paratriathleteAn athlete who takes part in the paratriathlon.paravirtualize(computing) To modify an operating system or software driver to allow paravirtualization.parethoxycaine(pharmacology) An anesthetic drug.parietopontine(anatomy) parietal and pontineparliamentlikeResembling or characteristic of a parliament.paroxypropioneThe antigonadotropin 4'-hydroxypropiophenoneparticipialize(grammar, transitive) To form into, or put in the form of, a participle.parvicursorineAny dinosaur of the subfamily ParvicursorinaepatagornithineAny extinct bird of the phorusrhacid subfamily Patagornithinaepathophenotype(pathology) A phenotype associated with a particular diseasepatriarchalize(transitive) To make patriarchal.pectinesterase(biochemistry) A ubiquitous cell-wall-associated enzyme that presents several isoforms that facilitate plant cell wall modification and subsequent breakdown, found in all higher plants as well as in some bacteria and fungipectocellulose(obsolete, biochemistry) A form of cellulose once thought to be a component of pectin.pedophilophobe(rare, American spelling) One who fears or hates pedophiles.pentabarbitoneMisspelling of pentobarbitone.pentacarbonate(chemistry) Any compound containing five carbonate groups in each molecule or unit cellpentacosadiene(organic chemistry) Any of very many isomeric forms of an unsaturated aliphatic hydrocarbon having 25 carbon atoms and two double bondspentacuspidateHaving five cuspspentadecanoate(organic chemistry) Any salt or ester of pentadecanoic acid.pentadecaoxide(inorganic chemistry) Any oxide containing fifteen atoms of oxygen per molecule, O₁₅.pentadecenoate(organic chemistry) Any salt or ester of pentadecenoic acidpentaglucoside(organic chemistry) A glucoside containing five glucose unitspentaglutamate(organic chemistry) Any compound (typically an ester) that has five glutamate groupspentahistidine(biochemistry) Five consecutive histidine amino-acids in a peptide or protein; the equivalent repeats in a nucleic acid or genepentahydroxide(chemistry) Any hydroxide having five hydroxyl groups.pentamanganese(chemistry, in combination) Five atoms of manganese in a chemical compound.pentamethylene(organic chemistry, especially in combination) Five methylene groups in a moleculepentamolybdate(inorganic chemistry) The polymeric anion composed of Mo₅O₁₆²⁻ clusters; any salt containing this anionpentapeptidase(biochemistry) Any enzyme that catalyses the hydrolysis of a pentapeptidepentaphosphate(chemistry) A compound having five phosphate groupspentaphosphide(inorganic chemistry) Any phosphide containing five phosphorus atomspentatelluride(inorganic chemistry) Any compound having five telluride ionspentathiophene(organic chemistry) An oligomer of thiophene (containing five units) that is used to image protein aggregatespentobarbitonepentobarbital (sodium salt)pentoxifylline(pharmacology) A xanthine derivative used to treat vascular dementia and intermittent claudication resulting from obstructed arteries in the limbs.pentoxyfyllineMisspelling of pentoxifylline.peppermintlikeResembling or characteristic of peppermint.peptidolactone(organic chemistry) Any lactone derived from hydroxy derivatives of amino acids.percentagewiseIn terms of, or as regards, a percentage.perfluoroctaneAlternative form of perfluorooctane.perflurobutaneMisspelling of perfluorobutane.peribronchioleperibronchiolarpericentromereThe area around a centromerepericentrosomeThe pericentrosomal area of a chromosomeperidromophile(rare) A collector of transfers.perilacustrinesurrounding a lakeperillaldehydeperilla aldehyde: a natural organic compound found most abundantly in the annual herb perilla, but also in a wide variety of other plants and essential oils. It is a monoterpenoid containing an aldehyde functional group.periosteophyte(biology) Any small, abnormal growth on the periosteumperipateticate(intransitive, rare) To travel about.peristaphylineAround the uvula or palate.peritoneoscope(medicine, dated) A narrow medical instrument used in peritoneoscopy.pernigranilineA fully oxidised from of polyanilineperoxovanadate(inorganic chemistry) A complex of vanadate and hydrogen peroxideperoxychromate(inorganic chemistry) The unstable oxyanion CrO₈³⁻ known only in solutionperoxyvanadate(inorganic chemistry) The oxyanion V₂O₇⁴⁻ (containing a peroxide link between the two vanadium atoms) or any salt containing this anionpersonalisableAlternative spelling of personalizable.personalizableThat can be personalized.perthiocyanate(chemistry) A salt or ester of perthiocyanic acid.petroplinthite(soil science) A petroplinthic soil, traditionally used to make bricksphagocytizableSynonym of phagocytable.phagolyososomeMisspelling of phagolysosome.phaneropterineAny of the subfamily Phaneropterinae of katydids.phantasmascopeAlternative form of phantascope.pharmacoactivepharmacologically activepharmacogenomeAll the genes that are affected by a pharmaceutical drugpharmacoperone(medicine) A pharmacological chaperone (protein) that is used for drug deliveryphascolarctine(zoology, obsolete) Of or relating to the obsolete taxonomic subfamily Phascolarctinae.phenanthridine(organic chemistry) A tricyclic aromatic heterocycle formally derived from phenanthrene by substituting a nitrogen atom for a CH group in the central ringphenanthroleneMisspelling of phenanthroline.phenanthroline(organic chemistry) A tricyclic heterocyclic compound having two pyridine rings fused with a benzene ring; any of its derivativesphenanthrylene(organic chemistry, especially in combination) Any divalent radical derived from phenanthrene, but especially 2,7-phenanthrylenephenaphthazineSynonym of nitrazine.phenarsazinine(organic chemistry) A tricyclic heterocycle consisting of two benzene rings fused to arsazinephenarsenamineThe drug arsphenamine.phenaziterpene(organic chemistry) Any terpenoid derivative of phenazinephenethylamide(organic chemistry) A derivative of phenethylamine and a carboxylic acid.phenethylamine(countable, organic chemistry) Any of a group of compounds derived from that amine.phenicarbazideA semicarbazide and an antipyretic substance, carcinogenic in mice.phenobarbitone(pharmacology) A barbiturate drug used as a sedative.phenosafranine(organic chemistry) The chemical compound C₁₈H₁₅ClN₄, used in photography.phenoxyacetone(organic chemistry) An ether derived from phenol and hydroxyacetone.phenpentermineα,β-dimethylamphetamine, a stimulant drug related to phentermine, used as an anorectic to help with weight loss.phenpropionate(chemistry) Any salt or ester of phenpropionic acid.phenylbutazone(pharmacology) An anti-inflammatory and analgesic drug used to treat arthritis and gout.phenylbutyrate(organic chemistry) Any phenyl derivative of a butyratephenylpyrazole(organic chemistry) Any phenyl derivative of a pyrazole, but especially any insecticide (such as fipronil) based upon this structurephenylpyridine(organic chemistry) Any of three isomeric phenyl derivatives of pyridine 2-, 3- or 4-phenylpyridinephenylpyruvate(biochemistry) An intermediate in the biosynthesis of phenylalanine, formed by the decarboxylation of prephenate with loss of hydroxyl.phenylselenide(chemistry) The anion C₆H₅Se⁻, or any salt containing this anionphenylthiazole(organic chemistry) Any of three isomeric phenyl derivatives of thiazolephenylthiolate(organic chemistry) The univalent radical C₆H₅-S- or anion C₆H₅-S⁻ derived from phenylthiol.pheochromocyteA chromaffin cell.pheomelanosomeA reddish-brown melanosome.philanthropiseAlternative form of philanthropize.philanthropize(ambitransitive) To give charitably to (a person or group).philipsbornite(mineralogy) A trigonal mineral containing aluminum, arsenic, hydrogen, lead, and oxygen.philipsburgite(mineralogy) A monoclinic-prismatic emerald green mineral containing arsenic, copper, hydrogen, oxygen, phosphorus, and zinc.philosophicideThe killing of a philosopher.philosophylikeResembling philosophy.phosphoacylaseSynonym of phosphate acetyltransferase.phosphoalanineAn N-phosphoryl derivative of alanine that inhibits proteinasesphosphoamidase(biochemistry) A hydrolase enzyme, phosphamide hydrolase, acting on phosphorus-nitrogen bonds.phosphocholine(organic chemistry) The choline ester of phosphoric acidphosphocitrate(organic chemistry) Any salt or ester of phosphocitric acidphosphoepitope(biochemistry) Any epitope that contains a phosphate groupphosphoferrite(mineralogy) An orthorhombic-dipyramidal mineral containing hydrogen, iron, manganese, oxygen, and phosphorus.phosphofibrite(mineralogy) An orthorhombic-dipyramidal mineral containing copper, hydrogen, iron, oxygen, phosphorus, and potassium.phosphoglucose(organic chemistry) glucose phosphatephosphoheptose(organic chemistry) Any phosphosugar derived from a heptosephosphohistone(biochemistry) A phosphoprotein related to histone.phosphohydraseAlternative form of phosphohydrolase.phosphoinosideMisspelling of phosphoinositide.phosphoisotype(immunology) phosphorylated isotypephospholactate(organic chemistry) Any salt or ester of phospholactic acidphosphomannoseSynonym of mannose phosphate.phosphonitrile(inorganic chemistry) any of many polymeric compounds of general formula (X₂PN)ₙ where X is an electronegative group such as halogen or alkoxyphosphopeptide(biochemistry) Any peptide that incorporates a phosphate group as a result of phosphorylationphosphoresidue(biochemistry) A phosphorylated residue.phosphoroscope(physics, chemistry) Any of several devices used to measure phosphorescence, and to distinguish it from fluorescencephosphoruslike(chemistry) Resembling phosphorus.phosphorylablephosphorylatablephosphosulfate(biochemistry) The univalent radical -OP(O₂H)-OSO₃H present in some nucleotides; it contains a high-energy sulfate bondphosphothioateMisspelling of phosphorothioate.photoacclimate(biology) To acclimate to a particular light environmentphotoactivablephotoactivatablephotoassociate(physics) To associate atoms by means of photoassociationphotoavoidance(biology) avoidance of exposure to lightphotocleavablecleavable by lightphotocoagulateTo cause or to undergo photocoagulationphotocorrosiveThat causes photocorrosionphotodecompose(ambitransitive) To decompose by a photochemical process.photoelectrode(physics) Either electrode of a photoelectric cellphotoevaporate(astronomy, of energetic radiation or its source) To ionise gas and cause it to disperse.photoexcitable(chemistry, physics) excitable (able to be put into an excited state) by absorption of a photonphotographableCapable of being photographedphotoimpedance(physics) impedance that varies depending on the amount of incident lightphotoinducibleThat supports photoinduction.photoinductiveRelating to photoinduction.photoirradiateTo irradiate with lightphotoisomerase(biochemistry) Any of a group of enzymes that catalyse the isomerization of photopigmentsphotoisomerize(chemistry) To cause a structural change between isomers through photoexcitationphotolarvicideA larvicide whose efficacy is improved with a photosensitizing agentphotoluminesceTo exhibit photoluminescencephotomezzotypeA photomechanical process similar to collotype.photooxidativeThat causes, or undergoes photooxidation.photoreceptive(biology) Absorbing and using light, especially for sensory purposesphotoreflexiveThat reflects lightphotoremovable(organic chemistry, of a protecting group) That can be photoreleasedphotoreportagephotojournalismphotoreproduce(transitive) To photocopy.photoresistivephotoconductivephotosculptureA sculpture thus made.photoselectiveThat affects only parts or areas treated with lightphotosensitiseAlternative spelling of photosensitize.photosensitiveHaving a reaction to, or able to be affected by, light.photosensitize(transitive) to make something photosensitivephotostabilizeTo add compounds that absorb ultraviolet radiation to plastics in order to reduce photodegradationphotostimulate(chemistry, physics) To stimulate by means of lightphotostrictiveOf, pertaining to, or causing photostrictionphototelescopeA telescope adapted for taking photographs of the heavenly bodies.phototolerance(biology) The condition of being phototolerantphototransduce(biology) To undergo phototransductionphthalaldehyde(organic chemistry) Any of three isomers of the dialdehyde C₆H₄(CHO)₂ derived from a phthalic acid (but especially the "ortho" isomer)phthalocyanine(organic chemistry) Any of a family of macrocyclic compounds having a structure similar to that of porphyrin; they are blue/green pigments that are used in plastics and enamels.phthalonitrile(organic chemistry) Any dinitrile derived from a phthalic acidphycoerythrineAlternative form of phycoerythrin.phyllochrysine(organic chemistry) An alkaloid and nervous system stimulant found in the tree Margaritaria discoidea.phyllomedusineAny of the subfamily Phyllomedusinae of tree frogs.phyllosilicate(mineralogy) Any silicate mineral having a crystal structure of parallel sheets of silicate tetrahedra.phyloreferenceA phylogenic referencephysiognotrace(historical) A device to facilitate the production of faithful profiles of human faces.phytoavailableavailable to plants (typically, from the soil)phytochelatineAlternative form of phytochelatin.phytochemotypeA plant chemotypephytolaccoside(organic chemistry) Any of a group of triterpenoid glycosides present in plants of the genus Phytolaccaphytomenadione(biochemistry, pharmacology) A yellow oily naphthoquinone C₃₁H₄₆O₂ that is obtained especially from alfalfa, cabbage, spinach, and other leafy green vegetables or made synthetically and that has a fast, potent, and prolonged biological effect. It is essential for the blood-clotting process, effective orally, and useful especially in treating hypoprothrombinemia induced by anticoagulant drugs (trademark Mephyton).phytoremediateTo carry out phytoremediation.phytostabilize(transitive) To subject to phytostabilization.phytosulfokineAny sulfokine of plant originphytovigilanceThe detection, assessment, understanding and prevention of adverse effects of plant productspicoflagellateAny picoscale flagellatepicoprokaryoteAny picoscale prokaryotepicotiterplateAlternative form of picotiter plate.piezocompositeRelating to a piezoelectric compositepiezoresistiveExhibiting piezoresistance.piezosensitivesensitive to applied pressurepigeonholeableAble to be pigeonholed; categorizable.pimaricinolide(organic chemistry) A macrolide related to pimaricinpinealectomiseAlternative form of pinealectomize.pinealectomizeTo perform a pinealectomy upon.pinnatipartite(botany, of leaves) Having lobes with incisions that extend more than half-way toward the midrib.piperacetazineAn antipsychotic prodrug.piperlongumine(organic chemistry) The cyclic amide 1-[(2E)-3-(3,4,5-trimethoxyphenyl)prop-2-enoyl]-5,6-dihydropyridin-2(1H)-one present in the pepper Piper longumpithecanthropeA member of the genus Pithecanthropus.plantarflexiveRelating to plantarflexors.plantationlikeResembling or characteristic of a plantation.plasmamembraneAlternative form of plasma membrane.plastoholotype(biology) An artificial mould or copy of a holotype specimen.plastoribosome(biology) A prokaryotic ribosomeplatinocyanate(chemistry) Any salt or ester of platinocyanic acid.platinocyanide(chemistry) Any of several salts containing the anion Pt(CN)₄²⁻plecomacrolide(organic chemistry) Any of a group of macrolides, having a hemiacetal sidechain, that are used in the treatment of postmenopausal osteoporosisplumbobetafite(mineralogy) An isometric-hexoctahedral mineral containing calcium, fluorine, hydrogen, lanthanum, cerium, praseodymium, neodymium, samarium, lead, niobium, oxygen, sodium, titanium, tungsten, and uranium.plumbojarosite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing hydrogen, iron, lead, oxygen, and sulfur.plurifoliolate(botany) Having multiple leaflets.pneumoactivateTo activate (or become activated) within the lungspodophthalmite(zoology) The eyestalk of a crustacean.poldervaartite(mineralogy) An orthorhombic-dipyramidal mineral containing calcium, hydrogen, manganese, oxygen, and silicon.poliglecaproneA copolymer of glycolide and a caprolactone that is used for suturingpoliticianlikeResembling a politician.polyacrilamideMisspelling of polyacrylamide.polyacrylamide(organic chemistry) Any of a range of cross-linked polymers of acrylamide; used to form soft gels for making contact lenses etc.polyacrylimideMisspelling of polyacrylamide.polyalkylimideA commercial polyimide used as a gel in reconstructive surgery.polyallylamine(organic chemistry) A polymer of allylaminepolyamidoamine(organic chemistry) A dendritic polymer composed of amide and amine unitspolyanthracene(organic chemistry) Any polymeric form of anthracenepolyasparagine(biochemistry) A polymer formed from asparagine monomers, or a portion of a protein consisting solely of asparaginepolycarpellate(botany) Synonym of polycarpellary.polychromatize(art) To paint using many colourspolycondensate(chemistry) Any substance prepared using polycondensationpolydendrocyteAn oligodendrocyte progenitor cell.polyderivative(organic chemistry) A derivative of a compound formed by adding or replacing many radicals or functional groups.polydispersivepolydispersepolyembryonate(botany) Consisting of, or having, several embryos; polyembryonic.polyesteramide(chemistry) Any polymer containing both ester and amide groups; used especially of rubber-like insulating materials.polyetherimideAn amorphous, amber, transparent, high-performance thermoplasticpolyethoxylate(organic chemistry) Any polymer based on ethoxylate monomerspolyfucosylateTo fucosylate at multiple positionspolyglecaproneMisspelling of poliglecaprone.polygonatosideA particular steroid glycoside.polyhaloalkane(chemistry) Any of very many aliphatic organic compounds derived from a hydrocarbon by the replacement of two or more hydrogen atoms with those of a halogenpolyisocyanate(chemistry) Any compound containing multiple isocyanate functional groupspolylithionite(mineralogy) A phyllosilicate mineral composed of potassium lithium aluminum silicate fluoridepolymacrocycleA polymer containing a macrocycle.polymorphocyte(cytology) A polymorphonuclear leukocytepolynorbornene(organic chemistry) Any of a class of polymer formed from norbornene monomerspolynucleosome(genetics) A series of many nucleosomespolynucleotide(biochemistry) A polymeric macromolecule composed of many nucleotides; examples include DNA and RNApolyoxoniobate(inorganic chemistry) a polyoxometalate of niobiumpolyphyllosideA particular steroid glycoside.polyplacophore(rare) polyplacophoranpolypragmosyne(rare) Meddlesomeness, officiousness.polypropionate(organic chemistry) Any of various polymers of propionate moietiespolypyrimidine(biochemistry) Any of many pyrimidine bases forming a sequence; especially a region of mRNA containing such a sequence which has a function in RNA splicingpolyrepetitive(biochemistry, of nucleic acid) That contains many repetitionspolyresistanceThe quality of being polyresistant.polysaccharase(biochemistry) Any enzyme that degrades/hydrolyses a polysaccharide.polysaccharide(biochemistry) A polymer made of many saccharide units linked by glycosidic bonds.polysaccharose(obsolete, chemistry) polysaccharidepolyunsaturateany polyunsaturated fat or fatty acidpolyvinylidene(chemistry) Any polymer derived from monomers of general formula CH₂=CX₂ where X is typically a halogenpomegranateade(rare) A sweetened drink made from pomegranates.pornonormativeOf or relating to pornonormativity.porphyrogenite(historical) An honorific title given to a son of a reigning emperor in the Byzantine Empire, notably borne by Constantine VII Porphyrogenitus.postabsorptiveFollowing absorption of nutrients from the alimentary canalpostaccelerateAlternative form of post-accelerate.postacceptanceRelating to events or conditions after acceptance happens.postapocalypseThe time after the apocalypse.postcollegiateOccurring after graduation from collegepostcommissure(anatomy) A transverse commissure in the posterior part of the roof of the third ventricle of the brain; the posterior cerebral commissure.postconceptiveFollowing conception.postconcussivePostconcussion.postconferenceOccuring after a conference.postconfluenceAlternative form of postconfluent.postconvulsiveFollowing a convulsion.postcorrectiveFollowing a correctionpostcytochrome(biochemistry) Following the release of a cytochromepostdepressiveFollowing a state of depression (unhappy state of mind).postearthquakeFinding place after an earthquake.postevaluativeAfter evaluation.postexperienceAfter an experience.postimperativeFollowing a commandpostmetaconuleposterior to the metaconulepostoccurrenceAfter an occurrence.postperovskite(geology) A high-pressure phase of several minerals, including magnesium silicatepostpubescenceThe period of life that follows pubescence.postrecurrence(medicine) After the recurrence of a condition.powerstructure(less common) Alternative form of power structure.praeponderanceObsolete and rare spelling of preponderance.pragmaticaliseTo make pragmaticpragmaticalizeAlternative form of pragmaticalise.preacknowledge(transitive) To acknowledge in advance.preadolescenceThe period between childhood and adolescence, between the ages of about nine and eleven for girls, and ten and twelve for boys.preagricultureBefore the advent of agriculture.preanesthetizeTo anesthetize prior to surgerypreassociative(mathematics) Prior to association into an aggregationprecandidatureBefore candidature.prechondrocyteA partially differentiated animal cell that will become a chondrocyte, part of cartilage.preconceivableAble to be preconceived.preconcentrate(transitive) To concentrate (a substance) in advancepreconsolidateTo consolidate in advance.precontractilePrior to contractionprecrystallineOf or relating to precrystalline states (or state) of a crystal.predecoherence(physics) A quantum state that leads to decoherencepredestinativeDetermining beforehand; predestinating.predeterminateDetermined beforehand.predisturbanceBefore a disturbance.predivestitureBefore divestiture.preequilibrateTo equilibrate prior to some other operationprefashionablePrior to becoming fashionable.preforeclosureThe stage at which preparations are made for foreclosurepregerminative(botany) Prior to germinationprehydrolysateThe product of a prehydrolysispreincorporate(transitive) To incorporate in advance.preindesignate(archaic, logic) Having no sign expressing quantity; indefinite.preinstructivePrior to instruction.preinteractiveBefore interaction.preinterchangeBefore an interchange.preintercourseBefore intercourse.prelegislativePrior to the introduction of legislation.premaintenancePrior to maintenance.premanufactureTo manufacture in advance.prenylchalconeAny prenylated chalcone.prepenultimateSynonym of antepenultimate.preperformanceDone or made before or in preparation for a performance.preprioceptive(rare) Alternative form of proprioceptive.preprosequence(biochemistry) A sequence of amino acid residues in a preproteinprequantizableAble to be prequantizedprereplicativeprior to replicationpresidentiable(French politics) A presidential candidate considered to have a good chance of winning an election.prespliceosomeA collection of proteins that is the precursor of a spliceosomeprestandardize(transitive) To standardize in advance.prestidigitate(intransitive) To perform magic with the hands or using sleight of hand.presuppurativeBefore suppuration.prevascularizeTo vascularize prior to some other operationpristinamycineAlternative spelling of pristinamycin.proaggregativeThat promotes aggregationprocalcitonineAlternative form of procalcitonin.procarboxysomeAn assemblage of enzymes that develops into a carboxysomeprochamazulene(organic chemistry) Any of a group of sesquiterpenes related to chamazuleneprochlorophyte(biology) a bright green cyanobacterium of the class Prochlorophyta, distinguished by the presence of both chlorophyll a and b and the lack of phycobilins (and so resembling the chloroplasts of higher plants)procoagulativeThat leads to procoagulationprocollagenase(biochemistry) Any enzyme that activates collagen, allowing it to be broken down by collagenasesprocompetitivePromoting competition in the marketplace.procontractileThat promotes contraction (of tissue)procrasturbate(slang, somewhat vulgar, intransitive) To procrastinate by masturbating.procrusteanize(transitive) To standardize without regard for individual differences.procrystallineThat will convert to a crystalline formproductionable(computing) ready to be placed into a production environmentproductionwiseIn terms of production; where production is concerned.proerythrocytereticulocyteprognosticableCapable of being prognosticated or foretold; predictable.progranulocytepromyelocyteprogressophobeOne who is pessimistic about the collateral damage of progress.proletarianiseNon-Oxford British English standard spelling of proletarianize.proletarianize(transitive) To turn (a person or group) into proletariat.promethiumlike(physics, chemistry) Having properties that resemble those of promethiumpronucleophile(chemistry) A compound or group that is readily converted into a nucleophilepropanediamine(organic chemistry) Either of two isomeric diamino derivatives of propane; any substituted derivative of these compoundspropargylamide(organic chemistry) Any amide attached to a propargylic carbon atom.propargylamine(organic chemistry) The acetylenic primary amine HC≡C-CH₂-NH₂propenenitrileacrylonitrilepropenultimate(rare) Synonym of antepenultimate: two places before last.propolypeptide(biochemistry) An inactive precursor to a polypeptide that is activated by posttranslational modificationproportionableCapable of being proportioned, or made proportional.propositionize(intransitive, linguistics) To formulate a proposition.proprioceptiveOf or pertaining to proprioception.propriolactoneMisspelling of propiolactone.propyleneoxideAlternative form of propylene oxide.propyphenazone(organic chemistry) A derivative of phenazone with similar analgesic and antipyretic effects.prostatosphereA spherical cluster of prostate cancer stem cellsproteoliposome(medicine, biochemistry) A liposome into which one or more proteins have been inserted, usually by artificial meansprotheobromineA diuretic drug.prothrombinase(biochemistry) A complex that catalyzes the conversion of prothrombin to thrombin in the presence of calcium ions.protoapigenone(organic chemistry) A flavonoid that induces apoptosisprotoberberine(organic chemistry) Any of several alkaloids related to berberineprotocoelomateAny primitive animal that evolved into the coelomatesprotoerubosideA particular steroid glycoside.protoeukaryoteA prokaryote that evolved into a eukaryote.protoimogoliteThe precursor of an imogoliteprotokaryotype(genetics) The earliest ancestor of a karyotypeprotopectinase(biochemistry) Any protease that breaks down protopectinprotophosphide(inorganic chemistry) Any of a series of phosphides of a particular metal that has the fewest atoms of phosphorus per moleculeprotosatelliteDescribing a ring of dust, surrounding a young planet, out of which moons developprotoscriptureSomething which is not yet scripture, but which is becoming or will become scriptureprotostructureAn initial structureprotoveratrine(organic chemistry) A ceveratrum alkaloid.protoyuccosideA particular steroid glycoside.provisionalize(dentistry) To provide with a provisional.proxymetacaine(pharmacology) A topical anesthetic drug of the aminoester group.pruritoceptive(pathology) Relating to pruritoceptionprymnesiophyte(biology) Any of many unicellular photosynthetic algae of the class Prymnesiophyceaepseudaconitine(organic chemistry) A highly toxic alkaloid with chemical formula C₃₆H₅₁NO₁₂, found in the roots of Aconitum ferox.pseudobrookite(mineralogy) An orthorhombic-dipyramidal mineral containing iron, magnesium, oxygen, and titanium.pseudocarapaceAn arrangement of many bones that make up the back of some marine turtlespseudocatalaseA preparation that attempts to substitute the action of impaired catalase in cases of vitiligopseudocatenane(organic chemistry) A complex polycyclic compound that appears to be a catenane.pseudoceramine(organic chemistry) Any of a group of brominated derivatives of spermines present in sponges of the genus Pseudoceratinapseudocleavage(biology) The formation of a furrow in the first cell cycle of some embryospseudocolorizeTo add pseudocolors (false colors)pseudodiscreteapparently, but not actually, discretepseudodistance(mathematics) A pseudometric having some characteristics of distancepseudoevidencefalse (or even fake) evidencepseudofemininefeminine or apparently feminine in certain aspects, but not truly femininepseudofolkloreFalse folklore; literature presented as folklore that is actually not.pseudofollicleA structure, in some malignant lymphomas, morphologically and immunologically similar to a follicle.pseudofractureA localized flaw in bone tissue presenting a radiologic appearance similar to that of a fracture; it is a radiologic sign that contributes to the diagnosis of osteomalacia.pseudohypocone(anatomy) A cusp, similar to a hypocone, that develops from a protocone (rather than the cingulum))pseudoinfiniteAppearing to be, but not in fact, boundless, endless, or limitless.pseudoinvasive(pathology) Being or relating to a pseudoinvasion.pseudojaundiceA medical condition that resembles jaundice but is not in fact jaundice, such as hypercarotenemia which can also cause yellow skin.pseudolanguage(countable, uncountable) Something written or spoken that resembles language but is not a true language.pseudoloculateHaving pseudoloculipseudomauveineA dye related to mauveine.pseudomedicineAlternative form of pseudo-medicine.pseudomembrane(medicine, pathology) A layer which resembles a membrane, especially one forming over a mucosal surface.pseudomolecule(genetics) A concatenation of contigs with a small sequence between them, intended to represent a larger, native-sized molecule.pseudomonotone(mathematics) Almost, but not entirely monotonepseudomorphine(zoology) Any ground beetle of the tribe Pseudomorphini, within the family Carabidae.pseudomorphoseto pseudomorphpseudonegativeResembling a negative state or condition.pseudopalatineAny phytosaur of the subfamily †Pseudopalatinae (now named tribe †Mystriosuchini)pseudopalisade(cytology) A hypercellular zone that typically surrounds necrotic tissuepseudoparasiteA temporary parasite, typically present due to accidental ingestion.pseudoparticle(physics) An instanton.pseudophyllineAny insect of the subfamily PseudophyllinaepseudopressureA value based on pressure but taking into account the compressibility and viscosity of gases.pseudoproteaseA rhomboid protease that lacks the amino acid residues that are essential for proteolysis, implying that it cannot cleave substrates.pseudopunicineSynonym of pseudopelletierine.pseudoracemate(chemistry) A deliberate mixture of enantiomers, or a solid solution of enantiomerspseudoresponseAlternative spelling of pseudo-response.pseudorhabdite(zoology) One of the rod-like corpuscles found in the integument of certain Turbellaria, filled with a soft granular substance.pseudorotaxane(chemistry) Any complex, having the general form of a rotaxane, but in which the linear component does not have bulky end groups.pseudosentenceA grammatically-correct sentence that has no inherent meaningpseudosequence(mathematics) An apparent sequence used as a key in data compressionpseudotentacleA tentacle-like outgrowth found on various speciespseudotriangle(mathematics) Any subset of a plane that lies between any three mutually tangent convex setspseudotrichome(botany) A structure similar to a trichomepseudoungulateAny mammal of the clade PseudoungulatapseudovalidateTo perform or to undergo pseudovalidationpseudovariable(computing) A named value that acts like a variable but is not a true variable.psilasterosideA particular steroid glycoside.psychedelicize(transitive) To make psychedelic.psychologylikeResembling psychology.psychomedicineThe use of psychoactive drugs.psychopracticepsychoanalytic practicepsychosyndromeA psychological or psychiatric syndromepterocommatineAny aphid of the tribe Pterocommatinipterodactylane(organic chemistry) A small, substituted ladderane supposed to have the form of a pterodactylpycnopodiosideA particular steroid glycoside.pyrazinamidase(biochemistry) An enzyme that converts the prodrug pyrazinamide to the active form pyrazinoic acidpyridostigmine(pharmacology) A parasympathomimetic and reversible cholinesterase inhibitor, used to treat muscle weakness and to combat the effects of curariform drug toxicity.pyridylaminate(organic chemistry) To react with a pyridylamino grouppyridylbenzene(organic chemistry) Synonym of phenylpyridine.pyridylglycine(organic chemistry) An N-pyridyl derivative of glycinepyrimidoindole(organic chemistry) Any of a class of heterocycles composed of a pyrimidine fused to an indolepyroantimonate(inorganic chemistry) Any salt of pyroantimonic acidpyroconvectiveOf, relating to, or caused by pyroconvection.pyrotartrimide(organic chemistry) The imide of pyrotartaric acidpyrrhoarsenite(mineralogy) A form of berzeliite containing some antimonypyrrhosiderite(mineralogy) A form of lepidocrocite