| pachyderm | (noun) any of various nonruminant hoofed mammals having very thick skin: elephant, rhinoceros, hippopotamus | - |
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| pacificism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacifism, passivism |
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| (noun) the belief that all international disputes can be settled by arbitration | Synonyms: pacifism |
| pacifism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacificism, passivism |
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| (noun) the belief that all international disputes can be settled by arbitration | Synonyms: pacificism |
| paganism | (noun) any of various religions other than Christianity or Judaism or Islamism | Synonyms: heathenism, pagan religion |
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| paleocerebellum | (noun) the anterior lobe of the cerebellum which was one of the earliest parts of the hindbrain to develop in mammals | - |
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| paleostriatum | (noun) the inner pale yellow part of the lenticular nucleus | Synonyms: globus pallidus, pallidum |
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| palladium | (noun) a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry | Synonyms: atomic number 46, Pd |
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| pallidum | (noun) the inner pale yellow part of the lenticular nucleus | Synonyms: globus pallidus, paleostriatum |
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| pallium | (noun) cloak or mantle worn by men in ancient Rome | - |
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| (noun) (Roman Catholic Church) vestment consisting of a band encircling the shoulders with two lappets hanging in front and back | - |
| (noun) (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell | Synonyms: mantle |
| (noun) the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum | Synonyms: cerebral cortex, cerebral mantle, cortex |
| palm | (noun) the inner surface of the hand from the wrist to the base of the fingers | Synonyms: thenar |
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| (noun) an award for winning a championship or commemorating some other event | Synonyms: decoration, laurel wreath, medal, medallion, ribbon |
| (noun) any plant of the family Palmae having an unbranched trunk crowned by large pinnate or palmate leaves | Synonyms: palm tree |
| (noun) a linear unit based on the length or width of the human hand | - |
| pandeism | (noun) the belief that God created the universe and its phenomena by becoming the universe, thereafter the sole manifestation of God | - |
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| pandemonium | (noun) a state of extreme confusion and disorder | Synonyms: bedlam, chaos, topsy-turvydom, topsy-turvyness |
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| panentheism | (noun) the belief that God is in part of the universe and its phenomena and also transcends the universe and intervenes in its operations | - |
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| panjandrum | (noun) an important or influential (and often overbearing) person | Synonyms: dignitary, high-up, high muckamuck, very important person, VIP |
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| pantheism | (noun) the doctrine or belief that God is the universe and its phenomena (taken or conceived of as a whole) or the doctrine that regards the universe as a manifestation of God | - |
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| (noun) (rare) worship that admits or tolerates all gods | - |
| papism | (noun) offensive terms for the practices and rituals of the Roman Catholic Church | Synonyms: popery |
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| (noun) the beliefs and practices of the Catholic Church based in Rome | Synonyms: Roman Catholicism, Romanism |
| paracosm | (noun) a prolonged fantasy world invented by children; can have a definite geography and language and history | - |
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| paradigm | (noun) a standard or typical example | Synonyms: epitome, image, prototype |
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| (noun) the generally accepted perspective of a particular discipline at a given time | - |
| (noun) the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another) | Synonyms: substitution class |
| (noun) systematic arrangement of all the inflected forms of a word | - |
| paragram | (noun) a pun made by changing the letters of a word, especially the initial letter. | - |
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| parallelism | (noun) similarity by virtue of corresponding | Synonyms: correspondence |
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| parallelogram | (noun) a quadrilateral whose opposite sides are both parallel and equal in length | - |
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| paralogism | (noun) an unintentionally invalid argument | - |
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| paramagnetism | (noun) materials like aluminum or platinum become magnetized in a magnetic field but it disappears when the field is removed | - |
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| paramecium | (noun) any member of the genus Paramecium | Synonyms: paramecia |
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| parapodium | (noun) one of a pair of fleshy appendages of a polychete annelid that functions in locomotion and breathing | - |
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| parasitism | (noun) the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage) | - |
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| parochialism | (noun) a limitation of views or interests like that defined by a local parish | - |
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| paronym | (noun) a word that strongly resembles another word in spelling | - |
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| paroxysm | (noun) a sudden uncontrollable attack | Synonyms: convulsion, fit |
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| particularism | (noun) a focus on something particular | - |
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| paspalum | (noun) tall tufted perennial tropical American grass naturalized as pasture and forage grass in southern United States | Synonyms: dallis grass, dallisgrass, Paspalum dilatatum |
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| passivism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacificism, pacifism |
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| paternalism | (noun) the attitude (of a person or a government) that subordinates should be controlled in a fatherly way for their own good | - |
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| patriotism | (noun) love of country and willingness to sacrifice for it | Synonyms: nationalism |
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| patronym | (noun) a family name derived from name of your father or a paternal ancestor (especially with an affix (such as -son in English or O'- in Irish) added to the name of your father or a paternal ancestor) | Synonyms: patronymic |
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| pauperism | (noun) a state of extreme poverty or destitution | Synonyms: indigence, need, pauperization, penury |
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| paynim | (noun) a heathen; a person who is not a Christian (especially a Muslim) | - |
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| pendulum | (noun) an apparatus consisting of an object mounted so that it swings freely under the influence of gravity | - |
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| penetralium | (noun) the innermost parts | - |
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| pentagram | (noun) a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon | Synonyms: pentacle, pentangle |
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| pentecostalism | (noun) the principles and practices of Pentecostal religious groups; characterized by religious excitement and talking in tongues | - |
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| peplum | (noun) a flared ruffle attached to the waistline of a dress or jacket or blouse | - |
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| (noun) a garment worn by women in ancient Greece; cloth caught at the shoulders and draped in folds to the waist | Synonyms: peplos, peplus |
| perfectionism | (noun) a disposition to feel that anything less than perfect is unacceptable | - |
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| pericardium | (noun) a serous membrane with two layers that surrounds the heart | - |
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| peridium | (noun) outer layer of the spore-bearing organ in many fungi | - |
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| perigonium | (noun) collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | Synonyms: chlamys, floral envelope, perianth, perigone |
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| perimysium | (noun) the sheath of connective tissue that covers a bundle of muscle fibers | - |
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| perineum | (noun) the general region between the anus and the genital organs | - |
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| perineurium | (noun) the sheath of connective tissue that covers a bundle of nerve fibers | - |
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| periosteum | (noun) a dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone | - |
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| peripateticism | (noun) (philosophy) the philosophy of Aristotle that deals with logic and metaphysics and ethics and poetics and politics and natural science | Synonyms: Aristotelianism |
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| perisperm | (noun) the nutritive tissue outside the sac containing the embryo in some seeds | - |
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| perithecium | (noun) flask-shaped ascocarp | - |
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| perithelium | (noun) tissue layer around small blood vessels | - |
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| peritoneum | (noun) a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera | - |
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| perm | (noun) a series of waves in the hair made by applying heat and chemicals | Synonyms: permanent, permanent wave |
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| permissivism | (noun) lenience toward or indulgence of a wide variety of social behavior. | - |
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| pertainym | (noun) meaning relating to or pertaining to | - |
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| pessimism | (noun) a general disposition to look on the dark side and to expect the worst in all things | - |
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| (noun) the feeling that things will turn out badly | - |
| petrolatum | (noun) a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication | Synonyms: mineral jelly, petroleum jelly |
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| petroleum | (noun) a dark oil consisting mainly of hydrocarbons | Synonyms: crude, crude oil, fossil oil, oil, rock oil |
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| phanerogam | (noun) plant that reproduces by means of seeds not spores | Synonyms: seed plant, spermatophyte |
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| phantasm | (noun) something existing in perception only | Synonyms: apparition, fantasm, phantasma, phantom, shadow |
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| (noun) a ghostly appearing figure | Synonyms: apparition, fantasm, phantasma, phantom, specter, spectre |
| phantom | (noun) something existing in perception only | Synonyms: apparition, fantasm, phantasm, phantasma, shadow |
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| (noun) a ghostly appearing figure | Synonyms: apparition, fantasm, phantasm, phantasma, specter, spectre |
| phellem | (noun) (botany) outer tissue of bark; a protective layer of dead cells | Synonyms: cork |
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| philhellenism | (noun) admiration for Greece and the Greeks and Greek customs | - |
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| philistinism | (noun) a desire for wealth and material possessions with little interest in ethical or spiritual matters | Synonyms: materialism |
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| phlebogram | (noun) an X ray of a vein injected with a radiopaque contrast medium | Synonyms: venogram |
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| phlegm | (noun) inactivity; showing an unusual lack of energy | Synonyms: flatness, languor, lethargy, sluggishness |
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| (noun) expectorated matter; saliva mixed with discharges from the respiratory passages; in ancient and medieval physiology it was believed to cause sluggishness | Synonyms: sputum |
| (noun) apathy demonstrated by an absence of emotional reactions | Synonyms: emotionlessness, impassiveness, impassivity, indifference, stolidity, unemotionality |
| phloem | (noun) (botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes | Synonyms: bast |
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| phoenicophorium | (noun) latanier palm | Synonyms: genus Phoenicophorium |
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| phonogram | (noun) any written symbol standing for a sound or syllable or morpheme or word | - |
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| photojournalism | (noun) journalism that presents a story primarily through the use of pictures | - |
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| phototropism | (noun) an orienting response to light | - |
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| phylum | (noun) (biology) the major taxonomic group of animals and plants; contains classes | - |
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| (noun) (linguistics) a large group of languages that are historically related | - |
| physicalism | (noun) (philosophy) the philosophical theory that matter is the only reality | Synonyms: materialism |
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| pianism | (noun) performance by or technique of a pianist | - |
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| pietism | (noun) exaggerated or affected piety and religious zeal | Synonyms: religionism, religiosity, religiousism |
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| pilgrim | (noun) someone who journeys in foreign lands | - |
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| (noun) someone who journeys to a sacred place as an act of religious devotion | - |
| pinetum | (noun) an area planted with pine trees or related conifers | - |
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| pinworm | (noun) small threadlike worm infesting human intestines and rectum especially in children | Synonyms: Enterobius vermicularis, threadworm |
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| piroplasm | (noun) minute parasite of red blood cells of mammals transmitted by a tick and causing diseases of domestic animals | - |
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| piroxicam | (noun) a nonsteroidal anti-inflammatory drug (trade name Feldene) used to treat arthritis and other inflammatory conditions | Synonyms: Feldene |
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| pisiform | (noun) a small wrist bone that articulates only with the triquetral | Synonyms: os pisiforme, pisiform bone |
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| placoderm | (noun) fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws | - |
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| plagiarism | (noun) the act of plagiarizing; taking someone's words or ideas as if they were your own | Synonyms: piracy, plagiarisation, plagiarization |
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| (noun) a piece of writing that has been copied from someone else and is presented as being your own work | - |
| planetarium | (noun) an apparatus or model for representing the solar systems | - |
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| (noun) an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome | - |
| (noun) a building housing an instrument for projecting the positions of the planets onto a domed ceiling | - |
| plasm | (noun) the protoplasm of the germ cells that contains chromosomes and genes | Synonyms: germ plasm |
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| (noun) the colorless watery fluid of the blood and lymph that contains no cells, but in which the blood cells (erythrocytes, leukocytes, and thrombocytes) are suspended | Synonyms: blood plasma, plasma |
| plasmodium | (noun) parasitic protozoan of the genus Plasmodium that causes malaria in humans | Synonyms: malaria parasite, Plasmodium vivax |
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| (noun) multinucleate sheet of cytoplasm characteristic of some stages of such organisms as slime molds | - |
| platform | (noun) a raised horizontal surface | - |
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| (noun) any military structure or vehicle bearing weapons | Synonyms: weapons platform |
| (noun) a woman's shoe with a very high thick sole | Synonyms: chopine |
| (noun) the combination of a particular computer and a particular operating system | - |
| (noun) a long, flat raised structure of a railway station, where people get on and off of trains | - |
| (noun) a document stating the aims and principles of a political party | Synonyms: political platform, political program, program |
| platinum | (noun) a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits | Synonyms: atomic number 78, Pt |
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| playroom | (noun) a recreation room for noisy activities (parties or children's play etc) | Synonyms: game room, rumpus room |
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| plebeianism | (noun) The quality or state of being of or pertaining to the common people; of being vulgar, common. | - |
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| plectrum | (noun) a small thin device (of metal or plastic or ivory) used to pluck a stringed instrument | Synonyms: pick, plectron |
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| plenum | (noun) an enclosed space in which the air pressure is higher than outside | - |
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| (noun) a meeting of a legislative body at which all members are present | - |
| pleochroism | (noun) the phenomenon of different colors appearing when certain crystals are viewed from different directions | - |
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| pleomorphism | (noun) (biology) the appearance of two or more distinctly different forms in the life cycle of some organisms | - |
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| (noun) (chemistry) the existence of different kinds of crystal of the same chemical compound | Synonyms: polymorphism |
| pleonasm | (noun) using more words than necessary | - |
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| plum | (noun) a highly desirable position or assignment | - |
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| (noun) any of numerous varieties of small to medium-sized round or oval fruit having a smooth skin and a single pit | - |
| (noun) any of several trees producing edible oval fruit having a smooth skin and a single hard stone | Synonyms: plum tree |
| plumbism | (noun) toxic condition produced by the absorption of excessive lead into the system | Synonyms: lead poisoning, saturnism |
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