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pacificismA moderate form of political pacifism which allows the use of violence against those seeking to commit greater violence.pagodiformSynonym of pagodalike, shaped like a pagoda.palatalismPalatal pronunciation.palatiform(rare) Palate-shaped; resembling the palate.palatogramAn image produced by palatographypalmerwormA gelechiid moth, Dichomeris ligulella, destructive to fruit trees.paludariumA tank or vivarium containing both aquatic and terrestrial elements.palumboismAlternative letter-case form of Palumboism.panarchism(politics) Advocacy of panarchy.panaritium(medicine) The purulent inflammation of a digit.panatheismThe assertion that no god or gods exist and that then nothing can be correctly termed holy or be considered sacred.panbiotismSynonym of hylozoism, the belief that all physical matter is alive in some sense.panchangamA Hindu calendar and almanac.pancosmism(philosophy) The belief that nothing exists except the physical and temporal universe. [from 19th c.]pancratium(Ancient Greece, uncountable) Synonym of pankration.panendeism(religion) A deistic equivalent of panentheism.pangermism(historical) The theory that all diseases are caused by germs.panjandrumAn important, powerful or influential person; muckamuck.pansensism(in the history of philosophy) The closely allied forms of panpsychism espoused by the Italian Renaissance philosophers Bernardino Telesio (1509–1588) and Tommaso Campanella (1568–1639), in which all things are capable of perception or sensation.panslavismAlternative form of Pan-Slavism.pantropism(biology) The condition of being pantropicpapiliformMisspelling of papilliform.papyriform(architecture) Having the form of, or decorated with papyrus flowersparabellumA type of cartridge used in some handguns.parabolism(obsolete, mathematics) The division of the terms of an equation by a known quantity that is involved in the first term.paradoxismAn avant-garde movement in the arts etc, based on heavy use of contradictions and paradoxes, founded by F. Smarandache in the 1980s.parahelium(physics) The form of the helium atom in which the spins of the two electrons form a singlet state (a state with zero total spin)paralogismA fallacious argument or illogical conclusion, especially one committed by mistake, or believed by the speaker to be logical.parameciumAn oval-shaped protozoan organism of the genus Paramecium.paraphragmA kind of lateral diaphragm in crustaceans.paraphylum(taxonomy) A member of a paraphyletic group of taxaparapodium(zoology) Any of the paired unjointed lateral outgrowths used for locomotion by worms such as annelids.parapterum(zoology) In certain insects, a parapteronpararthrumPart of the vertebra of metatheriansparasitism(ecology, biology) Interaction between two organisms, in which one organism (the parasite) benefits and the other (the host) is harmed.parazoniumA long ceremonial dagger from Roman times.parovarium(anatomy) The epoophoron.parthenium(botany) Any of the genus Parthenium of flowering plants in the aster family.partialism(Christianity, theology) The doctrine that Christ's atonement was made for only a part of humanity.partnerdomThe state or condition of being a partner; partnership.parvenudomThe realm or sphere of parvenus.parvenuismThe practices or characteristics of a social climber.pateriformResembling a patera.patriotismLove of one's country; devotion to the welfare of one's compatriots; passion which inspires one to serve one's country.peanutwormAlternative form of peanut worm.pedagogismThe character, manner, occupation, or system of pedagogues.pedalaviumAlternative form of pedilavium.pedelaviumAlternative form of pedilavium.pedicurismThe practice or the art of giving pedicures.pedilavium(Christianity) The rite of foot-washing based on the act carried out by Jesus Christ on his disciples at the Last Supper. Depending on the church or denomination, it may be carried out at baptism, during Holy Communion, or as part of a Maundy Thursday service; maundy.pediluviumThe bathing of the feet.peltaspermAny extinct plant of the order PeltaspermalespencilbeamA narrow beam of light that does not spread out.pentaprism(photography) A five-sided prism used in the viewfinder of most single-lens reflex camerasperidiolum(botany) An inner peridium inside of which the hymenium is formed.peridogramMisspelling of periodogram.perifibrumThe membranous covering of the spicules and fibre of sponges.perigonium(botany) The sterile parts of a flower; collectively, the sepals and petals (or tepals); the perianth.perigynium(botany) A specialized sheath-like bract that surrounds the ovary or fruit of some flowering plants, especially those in the family Cyperaceae (sedges); utricle.perihelium(astronomy, obsolete) Synonym of perihelion.perimortemAt, or near, the time of death.perimyciumMisspelling of perimysium.perimysium(anatomy) A layer of connective tissue which surrounds several muscle fibers into bundlesperiosteumA membrane surrounding a bone.periostiumMisspelling of periosteum.peripartumThat occurs around the time of labor and childbirth (parturition) (typically, within a few weeks before, intrapartum, or within a few weeks after).peripodium(zoology) Synonym of parapodium.peristylum(in ancient Roman contexts) A peristyle.peritoneum(anatomy) In mammals, the serous membrane lining the cavity of the abdomen and that is folded over the viscera.peritonism(pathology) Any condition having the symptoms of peritonitis but without the inflammation of the peritoneum.perizoniumA thin membrane surrounding the auxospore of a diatom.pervertismperversion; the behaviour of a pervertpetaliform(botany) Having the form of a petal.petrolaeumArchaic spelling of petroleum.petrolatumPetroleum jelly.peucedanumAny apiaceous plant of the genus Peucedanum.phallicismThe worship of the penis or phallus, especially connected with fertility.phallodeum(anatomy) A penis-like organ in male caecilians, which is inserted into the cloaca of the female for several hours.phanerogam(botany) Any plant that produces seeds (rather than spores).phantogramA type of optical illusion that works by using perspectival anamorphosis of stereoscopic vision to create distorted images.phantomism(Christianity, archaic, derogatory) The belief that Christ's corporeal body was an illusion.pharisaismThe doctrines and practices, or the character and spirit, of the Pharisees.phaseogramAlternative form of phasogram.phelloderm(botany) The innermost parenchymatous tissue of the periderm of some plantsphialiformShaped like a phial.philippium(obsolete) A supposed metallic element obtainable from samarskite, later discovered to be a mixture of yttrium and terbium.philoneismThe love of novelty or innovation.phlyzacium(medicine, obsolete) A large round, red pustule that is succeeded by a hard dark scab.phoenixismThe fraudulent practice of terminating a business as bankrupt while secretly using its assets to set up another business.phosacetimA toxic organophosphate used as a rodenticide.photochrom(historical) A colorized image produced from black-and-white photographic negatives via the direct photographic transfer of a negative onto lithographic printing plates.phyllidium(zoology) A muscular, leaf-shaped or cuplike outgrowth from the lateral wall of the scolex of some cestodes.phyllodium(botany) phyllodepicklewormDiaphania nitidalis, a crambid moth with wide triangular wings, a serious agricultural pest.picolinium(organic chemistry) Any cation produced by protonation of a picoline.picquerismAlternative form of piquerism.picturedomSynonym of filmdom (“the film or movie industry; the people who work in that industry”).piebaldism(medicine) A rare autosomal dominant disorder of melanocyte development, whose common characteristics include a congenital white forelock, scattered normally-pigmented and hyperpigmented macules, and a triangular depigmented patch on the forehead.pigeonplumThe plant Coccoloba diversifolia.pinacodermThe outermost layer of cells (pinacocytes) in the phylum Porifera (sponges), equivalent to the epidermis, and characterized as an epithelial layer of flattened cells.pinaverium(pharmacology) A calcium channel blocker used to treat functional gastrointestinal disorders.pioneerdomThe state of being a pioneer.pirazmonamA beta-lactam antibiotic.piritreximA particular antifolate drug.pistolgram(historical) Synonym of pistolgraph.pithiatism(psychology) A form of hysteria that can be cured by persuasive suggestion.plagiarism(uncountable) Text or other work resulting from this act.plaigarismMisspelling of plagiarism.plasmodesmAlternative form of plasmodesma.plasmodium(biology) A mass of cytoplasm, containing many nuclei, created by the aggregation of amoeboid cells of slime molds during their vegetative phase.plasticismThe state or condition of being plastic.plastidiumSynonym of plastid.playboyismBehaviour characteristic of a playboy.pneumatismSpiritualism centred on the belief in the pneuma.pneumogram(medicine) A record (often overnight) of the respiratory movements of a subject by the use of pneumography.poculiformHaving the shape of a goblet or drinking cup.podogynium(botany) A pedicel rising from the base of a flower with the ovary at the top.poecilonymSynonym of hybridism.polarogramA plot of current against potential produced by polarography.polemicismThe use of polemics.polemoniumAny of the genus Polemonium of gamopetalous perennial herbs.politicismA political utterance.polyandrum(obsolete) A tombpolyeidism(zoology) The quality or state of being polyeidic.polyethismThe presence of different work activities among different members of an insect community, or at different times in an insect's lifepolygenism(ethnology) The belief that humans descended from more than one ancestral pair.polyideism(psychology) The presence of several ideas in the mind at the same time.polylogismThe belief that different groups of people (based on race, class, historical era, etc.) reason in fundamentally different ways.polymerism(chemistry) The state, quality, or relation of two or more polymeric substances.polyoptrum(dated) A glass through which objects appear multiplied, but diminished in size.polyoxorimA particular fungicide.polyparium(biology) The stem, or supporting structure, of any colonial cnidarian such as coral.polypiformHaving the form of a polyppolypodium(botany) Synonym of polypody: any fern of the genus Polypodium.polyrhythm(uncountable, music) Music with multiple rhythmic elements played simultaneously.polysystemA group of systems that function together as a system.polytheismThe belief in the existence of multiple gods.polytypismThe existence of multiple types, especially of multiple subspecies.ponctiformMisspelling of punctiform.poofterdom(offensive) homosexualitypoofterism(UK, Australia, New Zealand, South Africa, slang, offensive) homosexualitypopularismAny political doctrine chosen to appeal to a majority of the electorate: populism.positivism(law) A school of thought in jurisprudence in which the law is seen as separated from moral values; i.e., the law is posited by lawmakers (people).postbellumOf the period following a war.postcoitumSynonym of postcoital.postfactumAlternative form of post factum.postmentum(zoology) The basal part of the labium in insects.postmortemAlternative form of post mortem.postpartum(of a mother, a symptom, a diagnosis or treatment, etc) After giving birth (often defined as within 30 days after childbirth).postracismA postracist situation.postreformAfter a reform.postschismAfter a schism.poultrydomThe realm or sphere of poultry.povertyismPrejudice against poor people.praeludiumObsolete spelling of preludium.praescutumArchaic form of prescutum.praesidiumAlternative form of presidium.praetoriumAlternative form of pretorium.pragmatismThe pursuit of practicality over aesthetic qualities; a concentration on facts rather than emotions or ideals.prebaptismBefore baptism.preceptismThe imposition of precepts.preconfirmTo confirm in advance.preconformTo conform by way of anticipation.precordium(anatomy) The region of the body over the heart and thorax.preformismpreformationismpremazepamA benzodiazepine derivative with anxiolytic and sedative properties in humans.preprogramTo program something in advance.prequantum(physics) Describing physics prior to quantum mechanics; classicalpresbytismDated form of presbyopia.presentismThe belief that only current phenomena are relevant.presternum(anatomy) The anterior or upper part of the sternum; the manubrium.preteendomPreadolescence.prickmadam(dated) Any of several species of stonecrop, such as Petrosedum rupestre, formerly used as ingredients of vermifuge medicines.primordium(anatomy) An aggregation of cells that is the first stage in the development of an organ.principiumsingular of principiaprinterdomThe world of printers and printing.probaculumAn immature baculumprocambium(botany) A meristem that lies just inside the protoderm and develops into primary xylem and primary phloemproctodeumThe back ectodermal part of an alimentary canal.profluviumA copious discharge of fluid, especially a bodily fluid.prometheumA rejected name for the chemical element promethium.promethiumA metallic chemical element (symbol Pm) with an atomic number of 61.propagulum(botany) A runner terminated by a germinating bud.prophetismThe work of prophets; prophecy.prophyllum(botany) Alternative form of prophyll.propleurumAlternative form of propleuron.propridiumMisspelling of propidium.propylaeum(historical, especially Ancient Greece and Ancient Rome) A vestibule or entrance, (especially) to a temple.prosaicismThe quality or state of being prosaic; a prosaic manner or style.proscenium(in a modern theater) The stage area between the curtain and the orchestra.prostatism(pathology) Any of various minor disorders of the prostate gland, typically causing obstructed urination; also called lower urinary tract symptoms (LUTS).prosternum(zoology) The ventral sclerite (plate) of the prothorax of an insect.prostomium(zoology) The portion of the head of an annelid situated in front of the mouth.prostoniumMisspelling of prostomium.proteiformchangeable in form; proteanproteoformA specific molecular form of a protein product arising from a specific gene.protoplasm(cytology) The entire contents of a cell comprising the nucleus and the cytoplasm. It is a semi-fluid, transparent substance which is the living matter of plant and animal cells.protourismIn favour of tourism.protoxylem(botany) The first xylem to form in a plant.pseudoatom(physics, chemistry) A delocalised cluster of electrons that takes the place of an atom in some structurespseudoform(mathematics) A pseudodifferential form.pseudonormpseudonormalpseudostem(botany) A false stem made of the rolled bases of leaves.psithurism(obsolete) The sound of rustling leaves or wind in the trees.psittacismMechanical, repetitive words used without understanding or consideration.psorosperm(zoology, obsolete) A minute parasite, usually the young of Gregarinae, in the pseudonavicula stage.psychicismThe study of psychic ability.psychogram(psychology, dated) A kind of visual diagram of an individual's personality.psydracium(medicine, obsolete) A tiny, irregular-shaped pustule.puerperium(obstetrics) The period of time lasting around a month immediately following childbirth, when the mother’s uterus shrinks back to its prepartum state.pumiciformResembling, or having the structure of, pumice.punctiformpointed; pointypunctuatimPoint for point; repeating each point (of an argument or doctrine) precisely.pupilogramAlternative form of pupillogram.puritanism(theology) Strict and austere religious conduct.pyramidismclassification into a rigid hierarchy, as of the sciencespyridinium(organic chemistry) The cationic, protonated form of pyridinepyruviniumMisspelling of pyrvinium.