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pacemakerlikeResembling a pacemaker.pachomonosideA particular steroid glycoside.pachybrachineAny beetle of the chrysomelid tribe Pachybrachini (subtribe Pachybrachina in some classifications).palaeoclimateAlternative spelling of paleoclimate.palaeoscience(geology) Any scientific discipline that studies the geologic past; especially a division of a study that normally focuses on the present geological state.palaeosurfaceAlternative form of paleosurface.palatalizableThat can be palatalized.paleocollapseA rock structure resembling the karst landform, but formed essentially by the dissolution of underlying sedimentary rock.paleodrainageAlternative form of palaeodrainage.paleolatitude(geology, paleontology) The former latitude of a particular geologic formation at a time in the geologic past, often specifically the time of formationpaleoproteomeAn ancient proteomepalladodymite(mineralogy) An orthorhombic-dipyramidal mineral containing arsenic, palladium, and rhodium.pallescensone(organic chemistry) A sesquiterpenoid furan present in the poriferan Dictyodendrilla cavernosa.palmatilobate(botany) Having palmate lobespaludicultureThe productive use of wet peatland.panchromatize(transitive, photography) To cover with a panchromatic coating.panproteinaseRelating to all proteinasespanresistanceResistance to all forms of antibiotic.pantetheinase(biochemistry) Any pantetheine hydrolasepantomimesqueCharacteristic of pantomime.papaveraldine(organic chemistry) The benzylisoquinoline alkaloid, (6,7-dimethoxy-1-isoquinolinyl)(3,4-dimethoxyphenyl)methanone, isolated from Papaver somniferumpapaverrubine(organic chemistry) Any of a class of methyl acetals derived from the poppy.papiliochrome(organic chemistry) Any of a group of yellow pigments found in the wings of papilionid butterfliespapulopustule(medicine) A small, raised, semisolid skin lesion, representing an intermediate stage between a papule and a pustule.papulovesicleA vesicle formed from an existing papuleparabrandtite(mineralogy) A triclinic colorless mineral containing arsenic, calcium, hydrogen, manganese, and oxygen.parabutlerite(mineralogy) An orthorhombic-dipyramidal mineral containing hydrogen, iron, oxygen, and sulfur.paracalcarineBeside the calcarine sulcusparacaseinateAny salt of paracaseinparachutelikeResembling or characteristic of a parachute.paracingulate(anatomy) Beyond or above a corresponding cingulate structureparacostibite(mineralogy) An orthorhombic-dipyramidal mineral containing antimony, cobalt, and sulfur.paradigmatize(obsolete, transitive) To set forth as a model or example.paradocrasite(mineralogy) A monoclinic-sphenoidal silver white mineral containing antimony and arsenic.paraflutizide(pharmacology) A thiazide diuretic.paragloboside(biochemistry) neolactotetraosylceramideparainfectiveOf or relating to parainfection.paralectotype(taxonomy) Any additional specimen from among a set of syntypes, after a lectotype has been designated from among them.parallelotope(geometry) A generalization of parallelogram and parallelepiped into a figure of arbitrary dimensionality.paramethasone(pharmacology) A fluorinated glucocorticoid.paramolybdate(inorganic chemistry) heptamolybdateparamphistomeAny parasitic flatworm of the genus Paramphistomumparanatrolite(mineralogy) A monoclinic-domatic mineral containing aluminum, calcium, hydrogen, oxygen, potassium, silicon, and sodium.paranthracene(chemistry) An inert isomeric modification of anthracene.paranthropineAny extinct hominid of the genus †Paranthropusparaoperative(medicine) Relating to equipment and accessories for an operation.paraphenylene(organic chemistry) The para isomer of phenyleneparapheromoneAny substance that mimics the effect of a pheromone and can be used as a lureparaphosphate(obsolete, inorganic chemistry) Synonym of pyrophosphate.paraphrasableAble to be paraphrasedpararesonanceautorhythmicityparasafranine(organic chemistry) The compound C₂₀H₁₈N₄, obtainable from mauveine.paraschoepite(mineralogy) An orthorhombic-dipyramidal yellow mineral containing hydrogen, oxygen, and uranium.parascholzite(mineralogy) A monoclinic mineral containing calcium, hydrogen, oxygen, phosphorus, and zinc.parascorodite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing arsenic, hydrogen, iron, and oxygen.paraselective(organic chemistry) regioselective of the para- position in a benzene ringparasitengone(zoology) Any mite of the clade Parasitengona.parasitophoreA parasitophorous vacuoleparatelluriteA synthetic, colourless tetragonal form of tellurium dioxide.paratungstate(organic chemistry, inorganic chemistry) The para- form of a tungstate.parchmentlikeResembling or characteristic of parchment.pardarinosideA particular steroid glycoside.parlimentaireAlternative spelling of parlementaire.parsettensite(mineralogy) A monoclinic-prismatic copper red mineral containing aluminum, calcium, hydrogen, magnesium, manganese, oxygen, potassium, silicon, and sodium.parthenophileOne who is sexually attracted to adolescent girls, particularly virginsparthenosporeA spore that develops without fertilization.participativeThat participates, or is capable of participatingparticulariseNon-Oxford British English spelling of particularize.particularize(transitive) To make particular, as opposed to general; to restrict to a specific or individual case, class etc.; to single out.partitionableThat can be partitioned.partridgelikeResembling or characteristic of a partridge.parvowinchite(mineralogy) A monoclinic-prismatic straw yellow mineral containing hydrogen, magnesium, manganese, oxygen, and silicon.passementerieA decorative piece of lace or other cloth on clothes.pasteurisableAlternative form of pasteurizable.pasteurizableCapable of being pasteurized.patchoulenone(organic chemistry) A tricyclic ketone derived from Cyperus rotundus. IUPAC name 4,10,11,11-tetramethyltricyclo[5.3.1.0^(1,5)]undec-4-en-6-onepathoadaptiveHaving or relating to an adaptive pathogenicitypathosymbioteSynonym of pathosymbiont.paucidisperseDescribing a colloid in which only a few different particle sizes existpaulkellerite(mineralogy) A monoclinic-prismatic greenish yellow mineral containing bismuth, hydrogen, iron, oxygen, and phosphorus.pawnbrokerage(uncountable) The business of pawnbroking.pcynidiosporeMisspelling of pycnidiospore.pedestrianate(intransitive, archaic) To travel by walking.pedestrianiseAlternative form of pedestrianize.pedestrianize(transitive) To restrict access to (a street) to pedestrians only, disallowing motor vehicles and sometimes cyclistspedicellariaeplural of pedicellariapedohebephileA person with pedohebephilia.pedunculoside(organic chemistry) A triterpene saponin, present in Ilex rotunda, that counters hyperlipidemia in ratspenehyclidineAn anticholinergic agent (as the hydrochloride) that has antimuscarinic and antinicotinic activitypenicillamine(biochemistry, pharmacology) A crystalline, sulfur-containing amino acid produced by the hydrolysis of penicillins, used pharmacologically as a chelating agent to remove heavy metals such as copper from the body, and as an anti-inflammatory agent, especially for rheumatoid arthritis; 2-amino-3-methyl-3-mercaptobutanoic acid, (CH₃)₂C(SH)CH(NH₂)COOH.penicillinase(biochemistry) A specific type of beta-lactamase showing specificity for penicillins.penicillinize(transitive, medicine) To treat (someone) with penicillin.penicillosideA particular steroid glycoside.penobsquisite(mineralogy) A monoclinic-sphenoidal pale yellow mineral containing boron, calcium, chlorine, hydrogen, iron, and oxygen.pentachloride(chemistry) any chloride containing five chlorine atoms in each moleculepentadecanone(organic chemistry) Any of several isomeric aliphatic ketones having fifteen carbon atomspentadienoate(organic chemistry) Any salt or ester of pentadienoic acid.pentafluoride(inorganic chemistry) Any fluoride containing five fluorine atoms in each molecule.pentagrapheneAlternative form of penta-graphene.pentahelicene(organic chemistry) The helicene having five benzene rings fused into a flat spiralpentamorphone(pharmacology) 14β-pentylaminomorphinone, a semisynthetic opiate derivative and analgesic.pentaselenide(chemistry, in combination) Five selenide ions in a compound (Se₅).pentasilicate(chemistry, in combination) Five silicate ions or groups in a compound.pentasiloxane(organic chemistry) Any siloxane having five -Si-O- groupspentasulphide(chemistry) any sulphide containing five sulphur atoms in each moleculepentasyllableA pentasyllabic wordpentathionate(inorganic chemistry) Any salt of pentathionic acidpentetreotide(pharmacology) A modified pentetic acid attached to a peptide segment.penthouselikeResembling or characteristic of a penthouse.pentiophenone(organic chemistry) The ketone C₆H₅-CO-(CH₂)₃-CH₃; butyl phenyl ketonepentofuranose(biochemistry) The furanose form of a pentosepentoxyfilineMisspelling of pentoxifylline.pentoxyverine(pharmacology) A cough suppressant.perceiverance(obsolete) Perception, awareness.perceptualize(transitive) To make (something) perceptual or sensed.perchlorinate(chemistry) To chlorinate thoroughly: to add the maximum amount of chlorine to.perditionable(rare) damnable.perfectionate(transitive, now rare) To make perfect or complete; to perfect.perfectionize(transitive, chiefly archaic) To bring to perfection; to perfect.perhaloalkane(organic chemistry) Any compound obtained by replacing every hydrogen atom of an alkane by that of a halogenperiadipocyteAny of a group of simple cells that surround an adipocytepericalcarine(anatomy) Surrounding the calcar of the brainpericartilageSynonym of perichondrium.pericentrioleAlternative form of pericentriolar.perielectrodeSurrounding an electrodeperimenopauseThe physiological stage that women approaching menopause go through when, due to hormonal changes, they progress from their usual pattern of menstruation through a phase of atypical menstruation, and finally cease menstruating. Perimenopause ends when a woman has not menstruated for a year.perimethamineMisspelling of pyrimethamine.periodicalize(transitive) Synonym of periodicize (“to make periodic; to divide into periods”).perioperative(surgery) Relating to the period around an operation, including immediate preoperative preparation and postoperative recovery.peripallosideA particular steroid glycoside.peripheralise(British spelling, transitive) Alternative form of peripheralize.peripheralize(transitive) To make peripheral; to marginalize.periphytivore(biology) Any organism that eats periphytonperiplocosideA particular steroid glycoside.periprocedureAlternative form of periprocedural.peritonealize(medicine) To subject to peritonealization.perivitallineMisspelling of perivitelline.perivitelline(anatomy) Situated around (or near) the vitellus.permethrinase(biochemistry) pyrethroid hydrolase, an enzyme involved in degradation of pyrethroid pesticidespermineralizeTo fossilize by permineralization.permingeatite(mineralogy) A tetragonal-scalenohedral pink brown mineral containing antimony, copper, and selenium.peronosporaleAny water mold of the order Peronosporales.peroxidisableAlternative spelling of peroxidizable.peroxidizableAble to be converted into a peroxideperoxinitrateMisspelling of peroxynitrite.peroxinitriteAlternative form of peroxynitrite.peroxonitrileperoxonitriteperoxonitrite(inorganic chemistry) The anion O=N-O-O⁻ isomeric with nitrateperoxyacetone(organic chemistry) acetone peroxideperoxynitrite(inorganic chemistry) The unstable oxyanion O=N-O-O⁻, a structural isomer of the nitrate anion; it exhibits cis-trans isomerismperserveranceMisspelling of perseverance.perseverativeOf or pertaining to perseveration.perseveraunceObsolete form of perseverance.personifiableAble to be personified.pertechnetate(inorganic chemistry) The univalent technetium anion TcO₄⁻; any salt containing this anionperuvianolideA withanolide present in Physalis peruvianapetroselinate(organic chemistry) Any salt or ester of petroselinic acidpettifogulize(nonce word, obsolete) To act as a pettifogger; to use contemptible tricks.pexophagosome(biology) An intracellular vesicle involved in the degradation of peroxisome by macropexophagyphacochoerineRelating to the phacochoeres (warthogs)phacoidoscopeAlternative form of phacoscope.phaegopterineAny of the subtribe Phaegopterina of tiger moths.phaeophorbideAlternative form of pheophorbide.phagolysosome(biology) A membrane-bound organelle which is formed from the fusing of a lysosome and a phagosomephalaenopsine(organic chemistry) An ester of a pyrrolizidine derivative, present in phalaenopsisphalangigrade(typically of camels and llamas) That walks on the phalanges instead of the hoovesphanerozonateRelating to starfish of the order Phanerozoniapharmacophore(pharmacology) The molecular framework responsible for a drug's biological activitypharyngealize(phonology) to constrict the pharynx while articulating another sound.pharyngoscopeAn instrument used to examine the pharynx.phaseomannite(chemistry, obsolete) inositolphenamazolineA histamine 1 receptor antagonist.phenampromide(pharmacology) A particular narcotic painkiller.phenathrolineMisspelling of phenanthroline.phencyclidine(pharmacology) A synthetic compound derived from piperidine, used as a veterinary anesthetic and in hallucinogenic drugs such as angel dust.phenethylline(rare) Alternative form of fenethylline.phenmetrazineA sympathomimetic drug that acts as a stimulant in the central nervous system.phenodevianceThe condition of being phenodeviantphenodominate(genetics) To act in a phenodominant mannerphenogenotype(genetics) A phenotype that is also a genotypephenoloxidase(biochemistry) An enzyme which catalyzes phenol oxidation, and which is often involved in melanization processesphenoloxydaseMisspelling of phenoloxidase.phenomenaliseAlternative form of phenomenalize.phenomenalize(transitive) To represent as a phenomenon.phenoperidine(pharmacology) A particular general anesthetic, an opioid.phenothiazine(organic chemistry) A polycyclic heterocycle consisting of two benzene rings fused to one of thiazine; thiodiphenylamine, dibenzothiazinephenoxathiine(organic chemistry) A tricyclic heterocycle consisting of two benzene rings fused to oxathiinephenoxazinone(organic chemistry) A ketone derived from a phenoxazine, especially the parent compound 1H-phenoxazin-1-onephenprobamateA centrally-acting skeletal muscle relaxant with additional sedative and anticonvulsant effects.phenylacetate(organic chemistry) Any salt or ester of phenylacetic acidphenylacetone(organic chemistry) An organic compound, a clear oil used in the manufacture of methamphetamine and amphetamine.phenylalanineThis molecule or its D-isomer.phenylaniline(organic chemistry) The aromatic secondary amine (C₆H₅)₂NH; it has many industrial applicationsphenylazirine(organic chemistry, especially in combination) Any phenyl derivative of an azirinephenylbenzene(chemistry) biphenylphenylephrine(medicine, pharmacology) An α-adrenergic receptor agonist related to adrenaline, used as a vasoconstrictor and nasal decongestant; 3-(1-hydroxy-2-methylamino-ethyl)phenol, with the formula C₉H₁₃NO₂.phenyllactateAny salt or ester of phenyllactic acid.phenylmethane(organic chemistry) Synonym of toluene.phenylnitrone(organic chemistry) Any phenyl derivative of a nitrone.phenylosazone(organic chemistry) Any osazone derived from phenylhydrazine and a sugarphenylpropane(organic chemistry) A propylbenzene.phenylpropeneAny of a class of phenylpropanoids in which a benzene ring has an allyl group attached to it. They are precursors for a variety of insecticides.phenylpropyne(organic chemistry) Any phenyl derivative of propyne.phenylpyrrole(organic chemistry) Any of three isomeric phenyl derivatives of pyrrole, both of which are the structural basis of many herbicides, antibiotics etc.phenyltropane(chemistry) Any of a class of compounds that include a large range of cocaine-like psychoactive stimulants.pheophytinase(biochemistry) An enzyme that degrades chlorophyll to form pheophytinphilogenitive(formal) Fond of children.phlogisticate(chemistry, obsolete, transitive) To combine phlogiston with (something).phoneidoscopeAn instrument for studying the motions of sounding bodies by optical means. It consists of a tube across whose end is stretched a film of soap solution thin enough to give coloured bands, whose form and position are affected by sonorous vibrations.phonendoscopeA form of stethoscope used in auscultationphonoresponseThe response of an organism to soundphosphaalkene(organic chemistry) an organophosphorus compound with a double bond between carbon and phosphorus (R₂C=PR)phosphaalkyne(chemistry) An organic chemical compound with a phosphorus to carbon triple bond (R-C≡P).phosphatidase(biochemistry) Any enzyme that catalyzes the hydrolysis of a lecithin or other phosphatide to a lysolecithin or other lysophospholipidphosphatidate(chemistry) A monoglyceride or diglyceride combined with phosphoric acid; combines with another simple organic molecule to form a phospholipid.phosphinidene(chemistry) phosphanylidenephosphinimide(organic chemistry) Any of a class of organic compound of general formula R₃P=NH; any N-derivative of this type of compoundphosphinoline(organic chemistry) A heterocycle formally derived from quinoline by replacing the nitrogen atom with phosphorusphosphoenzyme(biochemistry) The phosphorylated form of an enzymephosphohexose(organic chemistry) Any phosphosugar derived from a hexose.phosphokinase(biochemistry) kinasephospholidineSynonym of phospholane.phospholipase(biochemistry) Any of several enzymes that hydrolyze the phosphate ester bonds of phospholipids.phospholipideArchaic form of phospholipid.phosphomutase(biochemistry) Any mutase that acts on phosphate groupsphosphonatase(biochemistry) Any enzyme that hydrolyses phosphonatesphosphonylate(organic chemistry) To react (or be reacted) with a phosphonic acidphosphoramide(chemistry) any derivative of phosphoric acid in which each hydroxy group has been replaced with an amino or substituted amino group; P(=O)(NR₂)₃phosphoribose(biochemistry) ribose phosphatephosphorimageAlternative form of phosphoimage.phosphorylase(biochemistry) Any enzyme that catalyzes the production of glucose phosphate from glycogen and inorganic phosphatephosphorylate(transitive) To cause phosphorylation.phosphorylome(biochemistry) A proteome of phosphoproteins.phosphosalineContaining phosphate and saltphosphoserineAn ester of serine and phosphoric acid, found in many proteins as the result of posttranslational modifications.phosphotriose(organic chemistry) A triose phosphosugarphotoactivateTo activate by means of photoactivationphotoadaptiveRelating to, or undergoing photoadaptationphotoanaerobe(biology) Any photoautotrophic anaerobephotoaversiveRelating to photoaversionphotocleavage(chemistry, physics) The cleavage of a bond by photolysis.photocopiableCapable of being photocopied.photocopyloreA kind of folklore comprising humorous material and urban legends that are reproduced on photocopiers.photoemissiveOf or relating to photoemission.photoexchange(chemistry, physics) photochemical exchangephotoexposureexposure to lightphotographone(dated) A device, consisting essentially of an electric arc and a camera, by which a series of photographs of the variations of the arc due to sound waves are obtained for reproduction by means of a selenium cell and a telephone.photoinactiveNot photoactivephotoinitiate(chemistry) To initiate a chemical reaction by means of a form of lightphotomagazineA magazine (periodical publication) in which photographs feature prominently.photomedicine(medicine) The branch of medicine that involves the therapeutic use of light.photonegative(biology) having a negative phototropic or phototactic response; repelled by lightphotopositive(biology) having a positive phototropic or phototactic response; attracted by lightphotoreactivethat participates in, or initiates a photoreactionphotoregulate(biochemistry) To regulate photochemicallyphotoresponse(chemistry, physics, biology) Any measurable chemical or biological response to lightphotosequenceA sequence of photographs (made using a still camera)photosynthate(biochemistry) Any compound that is a product of photosynthesis.photounstablephotochemically unstablephotoxidativeAlternative form of photooxidative.phthalazinoneAlternative form of phthalazone.phthalidomideAlternative form of thalidomide.phthalimidine(organic chemistry) A derivative of phthalazine 2,3-dihydro-3-oxo-1H-isoindolephycobilisomeA light-harvesting antenna in cyanobacteria, red algae and glaucophytes.phycoxanthineAlternative form of phycoxanthin.phyllocladane(organic chemistry) A tetracyclic diterpene found in brown coal.phyllocyanineAlternative form of phyllocyanin.phylloquinone(biochemistry, pharmacology) Synonym of phytomenadione.phyllostomine(zoology) leaf-nosedphysicianlikeResembling or characteristic of a physician.physiognomiseAlternative form of physiognomize.physiognomize(transitive) To observe and study the physiognomy of.physionotraceAlternative form of physiognotrace.physostigmine(biochemistry, pharmacology) A parasympathomimetic, a reversible cholinesterase inhibitor alkaloid of the Calabar bean, used to treat certain medical conditions.phytoceramide(organic chemistry) Any ceramide derived from phytosphingosinephytoecdysone(biochemistry) Any ecdysone of plant originphytoheritage(biology) bioheritage in the form of plantsphytomedicine(medicine) Any medicine of plant origin.phytomoleculeAny molecule of a phytocompound; the phytocompound itselfphytonematode(biology) Any nematode that lives on a plantphytoparasite(ecology) A parasitic plant.phytoprostane(organic chemistry) Any prostane of plant origin; many show biochemical or pharmacological activitypicnidiosporeMisspelling of pycnidiospore.picobiliphyteA form of photosynthetic picoplankton.picodralazine(pharmacology) A vasodilator.picoeucaryote(biology) Any very small, usually unicellular, eucaryotepicoeukaryote(biology) Any eukaryotic organism that ranges in size from 0.2 to 2.0 µm.picosatelliteAn artificial satellite with a wet mass between 0.1 and 1 kilograms.picrochromite(mineralogy) Synonym of magnesiochromite.piezoresponse(physics) The change in dimension of a ferromagnetic material in the presence of an electric field; the piezoelectric effectpilocarpidine(organic chemistry) The alkaloid (3S,4R)-3-ethyl-4-(1H-imidazol-5-ylmethyl)oxolan-2-one related to pilocarpinepinacolborane(organic chemistry) The organoboron compound 4,4,5,5-tetramethyl-[1,3,2]dioxaborolane which is used in hydroboration reactionspineapplelikeHaving some characteristics of a pineapple; resembling or similar to a pineapple.pinnatilobate(botany) Having lobes arranged in a pinnate manner.pirellulosome(cytology) A compartment, in the cells of the bacterium Pirellula, that contains its RNApiricyclamideAny of a group of prenylated cyclic peptides in cyanobacteria of the genus Microcystis.pisasterosideA particular steroid glycoside, a saponin found in starfish.pitchforklikeResembling or characteristic of a pitchfork.pithomycolide(organic chemistry) A cyclodepsipeptide of the fungus Pithomyces chartarum.pivalaldehyde(organic chemistry) The aldehyde formed by reduction of the carboxylic acid group of pivalic acidplagiarizableCapable of being plagiarized.plagiogranite(mineralogy) Trondhjemite that occurs in the oceanic crust or in ophiolites.planctomyceteAny of many aquatic bacteria of the phylum Planctomycetes.planktonivore(biology) Any organism that feeds on planktonplasticulture(agriculture, uncountable) The use of plastics in agriculture.plastoglobule(biology) A globular mass of lipoprotein within a chloroplast.plastoquinone(biochemistry) a quinone, related to the carotenoids, involved in the electron transport process of photosynthesisplatitudiniseAlternative form of platitudinize.platitudinize(intransitive) To utter one or more platitudes; to make obvious, trivial, or clichéd remarks concerning a topic.platyphylline(organic chemistry) A Senecio alkaloid, sometimes used as a mydriatic.playstructureA large outdoor structure designed for children to play on, often located on a playground at parks and schools and with attachments such as monkey bars, slides, and stairs.plectranthone(organic chemistry) The diterpenoid [(1R,2S,4aR,8aR)-1-acetyloxy-8-methyl-6-oxo-2-propan-2-yl-1,2,3,4,5,8a-hexahydronaphthalen-4a-yl]methyl acetate; any isomer of this compoundpleurotergiteA sclerite that has both pleural and tergal elementsplumbocalcite(mineralogy) A variety of calcite that contains some lead carbonate.plumboferrite(mineralogy) A hexagonal-dihexagonal dipyramidal black mineral containing iron, lead, magnesium, manganese, and oxygen.plumbogummite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing aluminum, hydrogen, lead, oxygen, and phosphorus.plumbonacrite(mineralogy) A hexagonal mineral containing carbon, hydrogen, lead, and oxygen.plumbotsumite(mineralogy) An orthorhombic-disphenoidal colorless mineral containing hydrogen, lead, oxygen, and silicon.pluriliterateliterate in more than one language or scriptplurinucleateSynonym of multinucleate.pluripresencePresence in more than one place.plurisyllableA word of more than one syllable.pneumatophore(zoology) A gas-filled sac or float of some colonial marine coelenterates, such as the Portuguese man-of-war.pneumomassagepneumatic massage of the internal portions of the earpneumonialikeCharacteristic of pneumonia.pneumotactileRelating to the skin's ability to feel a pneumatic pulsepodobranchiaeplural of podobranchiapolianthosideA particular steroid glycoside.policemanlikeResembling or characteristic of a policeman.politicianesePolitical jargon; the obfuscatory or euphemistic language used by politicians.politicizableCapable of being politicized.polyacetylene(organic chemistry) Any of a class of organic compounds containing a acetylene (-C≡C-) repeat units, especially any that occur naturally in some composite plantspolyacylamide(organic chemistry) Any polyamide formed by the polymerisation of an acylamidepolyadelphite(mineralogy) A pale brown andradite garnetpolyadenosineA polymeric form of adenosinepolyadenylase(biochemistry) An enzyme that degrades polyadenylatepolyadenylate(chemistry) Any salt or ester of polyadenylic acid.polyalkenoateAny salt or ester of polyalkenoic acid.polyampholyte(chemistry) Any ampholytic polymerpolyanhydride(organic chemistry) The acid anhydride of a polycarboxylic acidpolyaspartateAny salt or ester of polyaspartic acidpolyattentiveAble to pay attention to several things at once.polybutadiene(organic chemistry) A polymer of butadiene, used to make synthetic rubber.polycarbamateAny of a family of polymers having carbamate units; the polymeric zinc salt is used as a fungicide and the organic esters are resinspolycarbazole(organic chemistry) An electrically conducting polymer obtained by the polymerization of carbazole.polycarbonate(organic chemistry) Any of a range of polymers of aromatic carbonates.polyconjugate(biology) A fluorescent marker or enzyme used to detect multiple antibodies.polycyanurate(biochemistry) Any polymer / plastic made from cyanurate monomers.polydioxanone(organic chemistry) A biodegradable plastic made by the polymerization of p-dioxanone; it is used in medical applications such as suturespolydisulfide(organic chemistry) Any polymer containing multiple disulfide bondspolydivisible(mathematics) Describing an integer whose first digits are divisible by the numbers of digits concernedpolyendocrineOf or pertaining to multiple endocrine glands.polygalactose(biochemistry) A polysaccharide composed of galactose unitspolyglucoside(organic chemistry) Any polymeric glucosidepolyglutamateA polymer formed from glutamate residuespolyglutamineInvolving more than one glutamine; (medicine) applied to a class of trinucleotide repeat disorder.polyglycolide(organic chemistry) An aliphatic polyester prepared by polymerization of glycolidepolyglyconate(organic chemistry) A polymeric glyconatepolyglycoside(organic chemistry) A polymeric glycosidepolygonoscope(obsolete) An arrangement of hinged mirrors for the production of multiple images of an object.polyguanosine(genetics) A long string of guanosine residues in a nucleic acidpolyhistidine(biochemistry) Several histidine residues linked together (usually at least six).polyisobutene(organic chemistry) A polymer of isobutene; butyl rubber.polykaryocyte(cytology) A cell that has many nucleipolymerisableAlternative spelling of polymerizable.polymerizable(chemistry) Able to be polymerizedpolymethylene(chemistry, in combination) Any of many organic compounds either having a polymeric structure of repeating -CH₂- groupspolyornithine(biochemistry) The polypeptide whose constituent amino acid is ornithinepolyoxazoline(organic chemistry) A polymer of oxazoline prepared by reacting a polymercaptan with an alkyl derivative of oxazoline or oxazinepolyoxoaurate(inorganic chemistry) A polyoxometalate with gold as the metal.polypeptidase(biochemistry) Any enzyme which catalyzes the hydrolysis of a polypeptidepolyphenylene(chemistry) Any of several polymers in which the repeat unit is a phenylene radical; but especially a polyphenylene oxidepolyphosphate(chemistry) any of a class of inorganic polymers containing linked phosphate groups; the low molecular weight polymers, such as sodium tripolyphosphate, are used in water softening and as food additivespolyphthalateAny polymer based of phthalate monomerspolypropyleneA thermoplastic resin made by the polymerization of propylene, and used for films, fibres, or moulding materials.polyquinolineA polymeric form of a quinoline.polysensitiseAlternative form of polysensitize.polysensitizeTo sensitize to many allergenspolysquaraine(organic chemistry) Any polymer based on squaraines, some of which have semiconducting propertiespolysubstanceInvolving many substances (used of drug abuse).polythiophene(organic chemistry) A polymer of thiophene that will conduct electricity under certain conditionspolythreonine(biochemistry) A polyaminoacid composed of threonine subunitspolythymidine(genetics) A sequence of multiple thymidine nucleosides found in the intronpolytungstate(obsolete, chemistry) Any salt of polytungstic acidponderomotiveAble to move a weight (or anything having mass)popularizableAble to be made popular.porcelainlikeResembling porcelain or some aspect of it.porcelainwareItems made from porcelain.pornographiseAlternative form of pornographize.pornographize(transitive) To make pornographic.porphomethene(organic chemistry) A porphyrin that contains a free methylene radicalpossibilitate(rare) To make possible.postarteriole(anatomy) Situated after the arterioles (used especially of the capillaries)postattentive(psychology) After paying attention.postcalcarine(anatomy) Behind the calcarine sulcuspostchallengeFollowing a (metabolic) challengepostcorporateFollowing the corporate; after the decline of corporations.postdebutanteA young woman who has made her formal appearance in society.postdepartureAfter departure.postdigestiveAfter digestion.postdischargeOccurring after discharge (especially, discharge from a hospital, military service, or other institution).postdoctoratepostdoctoralpostdominance(graph theory) The property of a node that postdominates another.postemergence(of herbicide use) After the emergence of the plants being targeted.postexistenceAn afterlife; a subsequent existence.posthectomize(surgery) To perform a posthectomy (on)posthurricaneAfter a hurricane.postinfectiveRelating to postinfectionpostingestiveFollowing ingestionpostlicensureOccurring after licensure.postmenopauseThe period in which menopause no longer occurs; often defined as the first full year in which no menstruation occurs.postmetaphase(biology) Following metaphasepostmoderneseThe jargon of postmodernism.postmoderniseAlternative spelling of postmodernize.postmodernize(transitive) To make postmodern.postocclusiveFollowing occlusionpostoperativeOf, relating to, or occurring in the period after a surgical operation.postpachytene(biology) Following pachytenepostprocedureOccurring after a procedure.postrequisiteSomething that is required at the conclusion of some part of a process.postresonance(physics) Subsequent to resonance.postselectiveFollowing selectionpotassiumlike(chemistry) Resembling potassium.potentiometre(nonstandard, uncommon) Alternative form of potentiometer.pourpointerieQuilting of the sort used in constructing pourpoints.powerviolenceAn extremely dissonant and fast subgenre of hardcore punk music, related to thrashcore and grindcore.praeternatureRare spelling of preternature.pramiconazole(pharmacology) A triazole antifungal drug under investigation for the treatment of acute skin and mucosal fungal infections.preabsorptiveOf or pertaining to preabsorptionpreacceptanceRelating to events or conditions before acceptance happens.preadaptativeprior to adaptationpreadjustableAble to be adjusted in advance.preadmittanceBefore admittance.prearticulateNot yet articulate; before the development of articulacy.preasphalteneAny compound similar to an asphaltene that is soluble in tetrahydrofuran.precalculableAble to be precalculated.precipitativeSynonym of precipitate.precognizablecognizable beforehandprecognizanceCognizance in advance; precognition.precollegiateBefore college.precommissureSynonym of anterior commissure.precompensateTo compensate in advance.precompetenceThe quality of being precompetent; the state preceding, and leading to, competence.precomputableCapable of being precomputed.preconferenceOccurring before or in preparation for a conference.preconfluenceA position prior to a confluenceprecongruence(mathematics) A congruence of a preorderpreconstitute(transitive) To constitute or establish beforehand.precrastinate(intransitive) To engage in precrastination.predeliberateTo deliberate in advance.predicentrine(organic chemistry) An aporphinoid alkaloid found in Litsea triflora.predisclosureprior disclosureprednicarbate(pharmacology) A topical corticosteroid drug.prednimustine(pharmacology) A drug used in chemotherapy, the ester formed from prednisolone and chlorambucil.preearthquakePeriod of time leading up to an earthquake.prefigurativeRelated to prefiguration; that prefigures.pregelatinize(transitive) To gelatinize in advance.preglottalize(transitive, phonology) To precede (a sound) by glottalization.pregnanedione(organic chemistry) Synonym of dihydroprogesterone.pregnediosideA particular steroid glycoside.pregnenedioneAn unsaturated diketone derivative of a pregnane.preilluminate(transitive) To illuminate in advance.preinitialize(transitive, computing) To preprepare (a data structure, etc.) so that it is ready to be initialized.preisingerite(mineralogy) A triclinic-pinacoidal mineral containing arsenic, bismuth, hydrogen, and oxygen.prejudicativeForming a prior judgment; prejudicialpreliteratureBefore the development of literature.premeditativeInvolving premeditation.premelanocyteThe precursor of a melanocyte.premelanosomeA non-pigmented vesicle, in a melanocyte, that develops into a melanosomepremetaconuleanterior to the metaconule.preneutralizeTo neutralize prior to some other operationprenoxdiazineA cough suppressant.prenucleosome(biology) A composite of histone and DNA that is converted into a nucleosome by a motor proteinprenunciative(obsolete, rare) announcing beforehandprenylflavoneAny prenylated flavone.prenylquinone(organic chemistry) Any prenyl derivative of benzoquinone, some of which have a role in thylakoid membranes in chloroplastspreoccurrenceA prior occurrence.prepersuasivePrior to persuasion.prepolymerizeTo polymerize prior to some other processpreponderanceSuperiority in amount or number; the bulk or majority; also, a large amount or number; an abundance, a profusion.preponderenceMisspelling of preponderance.preproductivePrior to productionpreprohormone(biochemistry) The precursor of a prohormone.preprojective(mathematics) Exhibiting a generalization of being projective, in which some, but not every surjective homomorphism splits.prepropeptideThe precursor of a propeptideprepubescenceThe period prior to the onset of puberty; prepubertyprequarantineBefore a quarantine.preraphaeliteAlternative form of Pre-Raphaelite.prerecurrence(medicine) Before the recurrence of a condition.prescriptableAlternative form of prescriptible.prescriptibleSubject to prescription.preselectableAble to be preselected.presenilinase(biochemistry) A protease that targets presenilinpresiliconizeTo siliconize prior to some other operationpresolubilizeTo solubilize in advancepressurizableCapable of being pressurized.prethermalizeTo produce or to undergo prethermalizationpretranscribeTo transcribe before some other operationpretransverseanterior of a transverse elementpreulcerativePrior to the formation of ulcersprevaricativeSynonym of prevaricatory.prevertebratePrior to the evolution of vertebratespriestesslikeResembling or characteristic of a priestess.primeveroside(organic chemistry) A glycoside of primeveroseprimigravidaeplural of primigravidaprimogenitureThe state of being the firstborn of the children of the same parents.primovaccineeAny of the first people or animals to be vaccinated (with a new vaccine)prioritizableCapable of being prioritized.proboscislikeResembling or characteristic of a proboscis.procatopodineAny fish of the subfamily ProcatopodinaeproceduraliseTo define a procedure.proceduralizeAlternative form of proceduralise.procoagulableAble to promote coagulationprocompromiseSupporting a compromise.proconvertase(biochemistry) A proteolytic convertaseproconvulsiveThat produces convulsionsprocrastibake(intransitive) To procrastinate by baking.procrastinate(intransitive) To delay taking action; to wait until later.procuratorateThe office of a procurator.prodepressiveThat promotes depressionproductionise(British spelling and Commonwealth) Alternative form of productionize.productionizeTo put into production; to manufacture; to turn a prototype into a mass production item.professionize(transitive) To advance (an occupation) to the level of a profession.professoriateProfessors considered as a group or body.professorlikeResembling a professor, characteristic of a professor.progelatinase(biochemistry) A precursor of gelatinasesprognosticate(transitive) To predict or forecast, especially through the application of skill.projectoscope(historical) A kind of kinetoscope, a device for exhibiting motion pictures.proliferative(not comparable, cytology) Of or pertaining to proliferation, especially of cells.prolylalanine(biochemistry) The dipeptide 2-(pyrrolidine-2-carbonylamino)propanoic acid formed by incomplete protein metabolismprolylpeptide(biochemistry) A region of a polypeptide or protein containing proline residuesprolymphocyte(biology) The immediate precursor of a lymphocyte, derived from a lymphoblast, found during lymphocytopoiesis.promagistrateIn ancient Rome, an ex-consul or ex-praetor whose imperium (the power to command an army) was extended at the end of his annual term of office or later.promelanosomeThat promotes the formation of melanosomespronominalize(grammar, transitive) To give the effect of a pronoun to; to replace with a pronoun.pronounceableCapable of being distinctly pronounced in speech; enunciable.pronunciativeOf or relating to pronunciation.propanedioate(chemistry) malonatepropanolamine(chemistry) Any of a class of amino alcohols derived from 1-amino-2-propanol, many of which are pharmaceutical drugs.propanthelineAn antimuscarinic drug.proparoxytone(linguistics, of a word) Having the stress or accent on the antepenultimate syllable.propellerlikeResembling or characteristic of a propeller.propenidazole(pharmacology) An imidazole derivative used in gynecology.propensenesse(obsolete) Inclination; propensity; tendency.propenylamine(organic chemistry) Synonym of allylamine.propiconazoleThe fungicide (2RS,4RS;2RS,4SR)-1-[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-ylmethyl]-1H-1,2,4-triazolepropinetidineA histamine 2 receptor antagonist.propioceptiveMisspelling of proprioceptive.propiolactone(organic chemistry) Either of two isomeric chemical compounds of the lactone family, α-propiolactone and β-propiolactone.propionitrile(organic chemistry) The nitrile CH₃-CH₂-CN; ethyl cyanidepropiophenone(organic chemistry) The ketone C₆H₅-CO-CH₂-CH₃; ethyl phenyl ketoneproportionateIn proportion; proportional; commensurable.proportioniseAlternative form of proportionize.proportionizeTo ensure that everything is in proper proportion to form a harmonious or properly functioning whole.propyladenine(organic chemistry) Any propyl derivative of adeninepropylbenzene(organic chemistry) The hydrocarbon CH₃-CH₂-CH₂-C₆H₅ that is the parent compound of the lignansproresorptiveThat promotes resorptionprorsiradiate(malacology, of the ribs of a cephalopod shell) Inclined forward.prosophylline(organic chemistry) A particular piperidine alkaloid found in the leaves of mesquite plants (of the genus Prosopis)prostacyclineAlternative form of prostacyclin.prostitutableAble to be prostituted.prosultiaminethiamine propyl disulfide, a disulfide thiamine derivative used to treat vitamin B1 deficiencyprotagrypnineAny extinct click beetle of the subfamily †Protagrypninaeprotelomerase(biochemistry) Any enzyme that generates and protects "hairpin" telomeresproteohormone(biochemistry) Any protein that acts as a hormoneproteomicelleA simple micelle (formed from protein and detergent) thought to be the precursor of biological cellsproteovesicleA vesicle composed of proteinprotestantize(transitive) To convert to Protestantism.prothionamideAlternative form of protionamide.prothyalosomeA spherical envelop of the nucleolus in the nucleus of an ovum.protoadditive(mathematics, of a function) Having the property that the result when applied to x + y is less than or equal to the sum of the result when applied to x plus the result when applied to y, for all values x and y in the domain.protoceratineSynonym of protokeratin.protochloride(inorganic chemistry) Any of a series of chlorides of a particular metal that has the fewest atoms of chlorine per moleculeprotochordateAny chordate of the phyla Hemichordata, Urochordata or CephalochordataprotodiastoleThe initial phase of diastole during which the aortic valve closesprotodolomite(geology) A mineral that (in the right conditions) will develop into dolomiteprotoelongateAny ribbed miter of the genus Protoelongata.protofluoride(inorganic chemistry) Any of a series of fluorides of a particular metal that has the fewest atoms of fluorine per moleculeprotoilludaneA particular sesquiterpene that is the basis of many natural productsprotolanguageAlternative form of proto-language.protoliterate(of a culture) With written language that is in its early stages.protomoleculeA collection of unstably bound atoms that has the potential to form a molecule if the structure can shed sufficient energy.protomylonite(petrology) A mylonite where most of the rock volume has not been ground into matrix and so contains its original texture.protonosphere(Earth's atmosphere, chiefly uncountable) Synonym of geocorona; a layer of the atmosphere.protooncogeneAlternative form of proto-oncogene.protoselenide(inorganic chemistry) Any of a series of selenides of a particular metal that has the fewest atoms of selenium per moleculeprotosequence(genetics) The sequence of bases in an ancestral genomeprotosilicate(chemistry) A silicate formed with the lowest proportion of silicic acid, or having only one atom of silicon in the molecule.protosulphate(chemistry) A compound of sulphuric acid with the protoxide of a metal.protosulphideAlternative spelling of protosulfide.protosyllableA vocalization in speech that is the precursor to a syllable.protothecoideA microalga of the species Auxenochlorella protothecoidesprotriptylineA particular tricyclic antidepressant, also used to treat ADHD.protruberanceMisspelling of protuberance.proverbialiseAlternative form of proverbialize.proverbialize(transitive) To turn into a proverb.provincialateThe office of a provincial (monastic superior).provincialiseAlternative spelling of provincialize.provincialize(transitive) To render provincial; to reduce or allot to provinces.proxyphyllineA xanthine derivative that acts as a cardiac stimulant, vasodilator, and bronchodilator.przhevalskite(mineralogy) A vitreous, orthorhombic yellow or green phosphate mineral.pseudoabsenceAn apparent absencepseudoantiqueApparently, but not actually, antique.pseudoapostleA false apostle.pseudoarticleA false or nonexistent article (piece of writing).pseudoboleite(mineralogy) A tetragonal-ditetragonal dipyramidal indigo blue mineral containing chlorine, copper, hydrogen, lead, and oxygen.pseudocapsuleA structure, similar to a capsule, that surrounds some carcinomaspseudocoelomeAlternative form of pseudocoelom.pseudoconcave(mathematics) (said of a function) differentiable and decreasing in any direction where it has a negative directional derivative.pseudohaltere(zoology) One of the club-like front wings of certain insects (stylops), resembling the halteres, or rudimentary hind wings, of Diptera.pseudoinverse(mathematics) Any of several structures, similar to inverses, related to complex matricespseudojervine(organic chemistry) A jerveratrum alkaloid.pseudolaueite(mineralogy) A monoclinic-prismatic orange mineral containing hydrogen, iron, manganese, oxygen, and phosphorus.pseudoleucite(geology) A pseudomorph of leucite that is a mixture of nepheline and orthoclasepseudomeasure(mathematics) A distribution that can be extended to a continuous functional.pseudomicelleA particle that has the outward appearance of a micellepseudomicrobeSynonym of pseudobacteria.pseudopassive(grammar) A construction where the object of a preposition has been promoted to the role of subject, as in The problem was talked about.pseudopeptide(organic chemistry) An amide of an amino acid that does not occur in natural peptides or proteins, especially one introduced into a polypeptide chainpseudopetiole(botany) The petiole of some monocotyledon leaves which is not part of the lower leaf zone.pseudopreciseApparently, but not actually, precise; exhibiting pseudoprecision.pseudopteraneAny soft coral of the genus Pseudopterogorgia (family Gorgoniidae)pseudorosette(medicine) A structure resembling a rosette (tumor cell formation) that is not a true rosette.pseudoscienceFictitious science as portrayed in science fiction.pseudoseizureA psychogenic nonepileptic seizure, distinguished from epilepsy only in not being associated with abnormal, rhythmic discharges of cortical neurons.pseudoservice(countable) Something offered or presented as a service that is not actually useful.pseudostipule(botany, usually in the plural) An often modified basal pair of leaflets of a compound leaf appearing very close to the stem.pseudosuicideSynonym of pseudocide.pseudosurface(physics) An extended region, often parallel to a surface, that in some way acts as if it were a surface.pseudosyncope(biology, medicine) A condition clinically similar to syncope but not truly syncopal in nature, being caused psychogenically; thus, apparent fainting but without concomitant hemodynamic and electroencephalographic changes.pseudotropine(organic chemistry) An isomer of tropine (3-exo)-8-methyl-8-azabicyclo[3.2.1]octan-3-olpseudouridine(biochemistry, genetics) An isomer of uridine, 5-ribosyluracil, associated with RNApsicopyranose(biochemistry) The pyranose form of psicosepsoralenoside(organic chemistry) A glycoside present in Psoralea corylifoliapsychoanalyseAlternative spelling of psychoanalyze.psychoanalyze(ambitransitive) To practice psychoanalysis (on).psychometrize(parapsychology) To discover information about an object's past, or past owners, merely by handling it.psychoscienceAny science that deals with the mind, mental behaviour, and mental disorders.psychotridineAn alkaloid, found in some species of Psychotria, with analgesic effects.psychowarfare(rare) psychological warfarepsychroactiveactive at low temperaturespsychrosphereThe deep, relatively cold layer of the ocean.ptenoglossate(zoology) Of or pertaining to the Ptenoglossa.pteriodophyteMisspelling of pteridophyte.pterostilbeneA stilbenoid chemically related to resveratrol.pterygiophore(marine biology) Any of the bones in a fish that support the dorsal fin. There are two to three of them: proximal, middle, and distal. In spinous fins the distal is often fused to the middle or not present at all.pterygopalateSynonym of pterygopalatine.pulmophyllineaminophylline.purmorphamine(organic chemistry) A protein agonist, 9-cyclohexyl-N-(4-morpholinophenyl)-2-(naphthalen-1-yloxy)-9H-purin-6-amine, that is involved in cardiovascular regenerationputrefactibleSusceptible to putrefaction; able to go rotten.pycnidiosporeA spore from a pycnidium.pyrazoleamide(organic chemistry) Any amide containing a pyrazole ring attached to the carbonyl group; several are antimalarial drugspyridofyllineA bronchodilator drug.pyrimethamine(pharmacology) A synthetic compound derived from pyrimidine, acting as a folic acid antagonist and used in the chemoprophylaxis or treatment of malaria and in the treatment of toxoplasmosis.pyrithyldioneA psychoactive drug formerly used as a sedative.pyroaconitine(organic chemistry) A chemical compound formed by heating aconitine ((1α,3α,6α,14α,16β)-20-ethyl-3,13-dihydroxy-1,6,16-trimethoxy-4-(methoxymethyl)-15-oxoaconitan-14-yl benzoate).pyrocarbonate(organic chemistry) Any ester of the hypothetical pyrocarbonic acid, having general formula R-O-CO-O-CO-O-Rpyrocatechase(biochemistry) Catechol 1,2-dioxygenasepyrocellulose(organic chemistry) nitrocellulose (cellulose nitrate) used in the manufacture of smokeless powder.pyroglutamase(biochemistry) An enzyme that catalyzes hydrolysis of pyroglutamic acid.pyroglutamate(organic chemistry) Any salt or ester of pyroglutamic acid.pyroglutamine(organic chemistry) A cyclic derivative of glutamine related to pyroglutamic acidpyrophosphate(inorganic chemistry) Any salt or ester of pyrophosphoric acid.pyrostilpnite(mineralogy) A certain monoclinic form of pyrargyrite.pyroxasulfone(organic chemistry) The pesticide 3-[[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)pyrazol-4-yl]methylsulfonyl]-5,5-dimethyl-4H-1,2-oxazolepyroxferroite(mineralogy) A yellowish silicate of the pyroxene group with a triclinic crystal structure.pyrrobutamineA particular antihistamine drug.pyrrolidinone(organic chemistry) Any heterocyclic ketone derived from pyrrolidine, but especially any 2-pyrrolidinone (a form of cyclic amide)pyrrolizidine(organic chemistry) Any of a class of alkaloids, found in many plants, that are hepatotoxic.pyrroloindole(organic chemistry) A tricyclic aromatic heterocycle composed of a pyrrole ring fused to one of indolepyruvaldehydeMethylglyoxal.