| protoavis | (noun) most primitive avian type known; extinct bird of the Triassic having bird-like jaw and hollow limbs and breastbone with dinosaur-like tail and hind limbs | - |
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| protoceratops | (noun) small horned dinosaur | - |
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| protocol | (noun) code of correct conduct | - |
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| (noun) forms of ceremony and etiquette observed by diplomats and heads of state | - |
| (noun) (computer science) rules determining the format and transmission of data | Synonyms: communications protocol |
| protoctist | (noun) any of the unicellular protists | - |
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| protogeometric | (adjective) characteristic of the earliest phase of geometric art especially in Greece | - |
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| protoheme | (noun) a complex red organic pigment containing iron and other atoms to which oxygen binds | Synonyms: haem, haemitin, hematin, heme |
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| protohemin | (noun) a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood | Synonyms: hemin |
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| protohippus | (noun) Pliocene horse approaching donkeys in size | - |
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| protohistory | (noun) the study of humans prior to the invention of writing | Synonyms: protoanthropology |
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| protology | (noun) the study of origins and first things | - |
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| protomammal | (noun) probably warm-blooded; considered direct ancestor of mammals | Synonyms: therapsid |
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| proton | (noun) a stable particle with positive charge equal to the negative charge of an electron | - |
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| protoplasm | (noun) the substance of a living cell (including cytoplasm and nucleus) | Synonyms: living substance |
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| protoplast | (noun) a biological unit consisting of a nucleus and the body of cytoplasm with which it interacts | Synonyms: energid |
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| prototherian | (noun) primitive oviparous mammals found only in Australia and Tasmania and New Guinea | - |
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| prototypal | (adjective) representing or constituting an original type after which other similar things are patterned | Synonyms: archetypal, archetypical, prototypic, prototypical |
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| prototype | (noun) a standard or typical example | Synonyms: epitome, image, paradigm |
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| prototypic | (adjective) representing or constituting an original type after which other similar things are patterned | Synonyms: archetypal, archetypical, prototypal, prototypical |
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| prototypical | (adjective) representing or constituting an original type after which other similar things are patterned | Synonyms: archetypal, archetypical, prototypal, prototypic |
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| protozoal | (adjective) of or relating to the Protozoa | Synonyms: protozoan, protozoic |
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| protozoan | (adjective) of or relating to the Protozoa | Synonyms: protozoal, protozoic |
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| (noun) any of diverse minute acellular or unicellular organisms usually nonphotosynthetic | Synonyms: protozoon |
| protozoic | (adjective) of or relating to the Protozoa | Synonyms: protozoal, protozoan |
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| protozoological | (adjective) concerning the branch of zoology that studies protozoans | - |
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| protozoologist | (noun) a zoologist who studies protozoans | - |
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| protozoology | (noun) the branch of zoology that studies protozoans | - |
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| protozoon | (noun) any of diverse minute acellular or unicellular organisms usually nonphotosynthetic | Synonyms: protozoan |
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| protract | (verb) lengthen in time; cause to be or last longer | Synonyms: draw out, extend, prolong |
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| protracted | (adjective) relatively long in duration; tediously protracted | Synonyms: drawn-out, extended, lengthy, prolonged |
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| protractedly | (adverb) in a slow, leisurely or prolonged way | Synonyms: lingeringly |
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| protractible | (adjective) able to be extended | Synonyms: protractile |
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| protractile | (adjective) able to be extended | Synonyms: protractible |
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| protraction | (noun) the act of prolonging something | Synonyms: lengthening, perpetuation, prolongation |
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| (noun) the consequence of being lengthened in duration | Synonyms: continuation, lengthiness, prolongation |
| protractor | (noun) drafting instrument used to draw or measure angles | - |
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| protriptyline | (noun) tricyclic antidepressant used to treat clinical depression | - |
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| protrude | (verb) swell or protrude outwards | Synonyms: bulge, pouch |
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| (verb) bulge outward | Synonyms: bug out, bulge, bulge out, come out, pop, pop out, start |
| (verb) extend out or project in space | Synonyms: jut, jut out, project, stick out |
| protruding | (adjective) extending out above or beyond a surface or boundary | Synonyms: jutting, projected, projecting, relieved, sticking, sticking out |
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| protrusible | (adjective) capable of being thrust forward, as the tongue | Synonyms: protrusile |
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| protrusile | (adjective) capable of being thrust forward, as the tongue | Synonyms: protrusible |
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| protrusion | (noun) the act of projecting out from something | Synonyms: jut, jutting, projection |
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| (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, extrusion, gibbosity, gibbousness, hump, jut, prominence, protuberance, swelling |
| protrusive | (adjective) thrusting outward | - |
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| protuberance | (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, swelling |
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| (noun) the condition of being protuberant; the condition of bulging out | - |
| protuberant | (adjective) curving outward | Synonyms: bellied, bellying, bulbous, bulging, bulgy |
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| protuberate | (verb) form a rounded prominence | - |
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| (verb) cause to bulge out or project | - |
| proturan | (noun) any of several minute primitive wingless and eyeless insects having a cone-shaped head; inhabit damp soil or decaying organic matter | Synonyms: telsontail |
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| proud | (adjective) feeling self-respect or pleasure in something by which you measure your self-worth; or being a reason for pride | - |
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| (adjective) having or displaying great dignity or nobility | Synonyms: gallant, lofty, majestic |
| proudly | (adverb) with pride; in a proud manner | - |
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| provability | (noun) capability of being demonstrated or logically proved | Synonyms: demonstrability |
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| provable | (adjective) capable of being demonstrated or proved | Synonyms: demonstrable |
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| provably | (adverb) in an obvious and provable manner | Synonyms: demonstrably, incontrovertibly |
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| prove | (verb) establish the validity of something, as by an example, explanation or experiment | Synonyms: demonstrate, establish, shew, show |
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| (verb) obtain probate of | - |
| (verb) prove formally; demonstrate by a mathematical, formal proof | - |
| (verb) provide evidence for | Synonyms: bear witness, evidence, show, testify |
| (verb) take a trial impression of | - |
| (verb) cause to puff up with a leaven | Synonyms: leaven, raise |
| (verb) increase in volume | Synonyms: rise |
| (verb) put to the test, as for its quality, or give experimental use to | Synonyms: essay, examine, test, try, try out |
| (verb) be shown or be found to be | Synonyms: turn out, turn up |
| proved | (adjective) established beyond doubt | Synonyms: proven |
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| proven | (adjective) established beyond doubt | Synonyms: proved |
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| provenance | (noun) where something originated or was nurtured in its early existence | Synonyms: birthplace, cradle, place of origin, provenience |
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| provencal | (adjective) of or relating to Provence or its people or their culture | - |
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| provender | (noun) a stock or supply of foods | Synonyms: commissariat, provisions, viands, victuals |
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| (noun) food for domestic livestock | Synonyms: feed |
| provenience | (noun) where something originated or was nurtured in its early existence | Synonyms: birthplace, cradle, place of origin, provenance |
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| proverb | (noun) a condensed but memorable saying embodying some important fact of experience that is taken as true by many people | Synonyms: adage, byword, saw |
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| proverbial | (adjective) of or relating to or resembling or expressed in a proverb | - |
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| (adjective) widely known and spoken of | - |
| proverbially | (adverb) in the manner of something that has become a byword | - |
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| provide | (verb) take measures in preparation for | - |
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| (verb) determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation | - |
| (verb) give what is desired or needed, especially support, food or sustenance | Synonyms: cater, ply, supply |
| (verb) give something useful or necessary to | Synonyms: furnish, offer, render, supply |
| (verb) supply means of subsistence; earn a living | Synonyms: bring home the bacon |
| (verb) mount or put up | Synonyms: offer, put up |
| (verb) make a possibility or provide opportunity for; permit to be attainable or cause to remain | Synonyms: allow, allow for, leave |
| providence | (noun) the guardianship and control exercised by a deity | - |
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| (noun) the prudence and care exercised by someone in the management of resources | - |
| (noun) a manifestation of God's foresightful care for his creatures | - |
| provident | (adjective) providing carefully for the future | - |
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| (adjective) careful in regard to your own interests | - |
| providential | (adjective) relating to or characteristic of providence | - |
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| (adjective) peculiarly fortunate or appropriate; as if by divine intervention | Synonyms: heaven-sent, miraculous |
| (adjective) resulting from divine providence | Synonyms: divine |
| providentially | (adverb) in a providential manner; as determined by providence | - |
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| (adverb) in a fortunately providential manner | - |
| (adverb) in a prudent manner | Synonyms: prudently |
| providently | (adverb) in a provident manner | - |
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| provider | (noun) someone whose business is to supply a particular service or commodity | Synonyms: supplier |
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| (noun) someone who provides the means for subsistence | - |
| province | (noun) the territory occupied by one of the constituent administrative districts of a nation | Synonyms: state |
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| (noun) the proper sphere or extent of your activities | Synonyms: responsibility |
| provincial | (adjective) characteristic of the provinces or their people | - |
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| (adjective) of or associated with a province | - |
| (noun) a country person | Synonyms: bucolic, peasant |
| (noun) (Roman Catholic Church) an official in charge of an ecclesiastical province acting under the superior general of a religious order | - |
| provincialism | (noun) a partiality for some particular place | Synonyms: localism, sectionalism |
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| (noun) a lack of sophistication | - |
| provincially | (adverb) by the province; through the province | - |
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| provirus | (noun) cDNA copy of the RNA genome of a retrovirus; the genetic material of a virus as incorporated into and able to replicate with the genome of a host cell | - |
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| provision | (noun) the activity of supplying or providing something | Synonyms: supply, supplying |
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| (noun) the cognitive process of thinking about what you will do in the event of something happening | Synonyms: planning, preparation |
| (noun) a stipulated condition | Synonyms: proviso |
| (noun) a store or supply of something (especially of food or clothing or arms) | - |
| (verb) supply with provisions | Synonyms: purvey |
| provisional | (adjective) under terms not final or fully worked out or agreed upon | Synonyms: probationary, provisionary, tentative |
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| provisionally | (adverb) temporarily and conditionally | - |
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| provisionary | (adjective) under terms not final or fully worked out or agreed upon | Synonyms: probationary, provisional, tentative |
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| provisioner | (noun) a supplier of victuals or supplies to an army | Synonyms: sutler, victualer, victualler |
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| provisions | (noun) a stock or supply of foods | Synonyms: commissariat, provender, viands, victuals |
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| proviso | (noun) a stipulated condition | Synonyms: provision |
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| provisory | (adjective) subject to a proviso | - |
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| provitamin | (noun) vitamin precursor; a substance that is converted into a vitamin in animal tissues | - |
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| provocateur | (noun) a secret agent who incites suspected persons to commit illegal acts | Synonyms: agent provocateur |
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| provocation | (noun) unfriendly behavior that causes anger or resentment | Synonyms: aggravation, irritation |
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| (noun) needed encouragement | Synonyms: incitement |
| (noun) something that incites or provokes; a means of arousing or stirring to action | Synonyms: incitation, incitement |
| provocative | (adjective) serving or tending to provoke, excite, or stimulate; stimulating discussion or exciting controversy | - |
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| (adjective) intentionally arousing sexual desire | - |
| provocatively | (adverb) in a provocative manner | Synonyms: provokingly |
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| provoke | (verb) provide the needed stimulus for | Synonyms: stimulate |
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| (verb) evoke or provoke to appear or occur | Synonyms: call forth, evoke, kick up |
| (verb) call forth (emotions, feelings, and responses) | Synonyms: arouse, elicit, enkindle, evoke, fire, kindle, raise |
| (verb) annoy continually or chronically | Synonyms: beset, chevvy, chevy, chivvy, chivy, harass, harry, hassle, molest, plague |
| provoked | (adjective) incited, especially deliberately, to anger | Synonyms: aggravated |
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| provoker | (noun) someone who deliberately foments trouble | Synonyms: firebrand, inciter, instigant, instigator |
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| provoking | (adjective) causing or tending to cause anger or resentment | Synonyms: agitating, agitative |
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| provokingly | (adverb) in a provocative manner | Synonyms: provocatively |
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| provost | (noun) a high-ranking university administrator | - |
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| prow | (noun) front part of a vessel or aircraft | Synonyms: bow, fore, stem |
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| prowess | (noun) a superior skill that you can learn by study and practice and observation | Synonyms: art, artistry |
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| prowl | (noun) the act of prowling (walking about in a stealthy manner) | - |
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| (verb) move about in or as if in a predatory manner | - |
| (verb) loiter about, with no apparent aim | Synonyms: lurch |
| prowler | (noun) someone who prowls or sneaks about; usually with unlawful intentions | Synonyms: sneak, stalker |
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| prox | (adjective) in or of the next month after the present | Synonyms: proximo |
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| proxemics | (noun) the study of spatial distances between individuals in different cultures and situations | - |
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| proximal | (adjective) situated nearest to point of attachment or origin | - |
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| proximate | (adjective) closest in degree or order (space or time) especially in a chain of causes and effects | - |
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| (adjective) very close in space or time | - |
| proximity | (noun) the property of being close together | Synonyms: propinquity |
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| (noun) a Gestalt principle of organization holding that (other things being equal) objects or events that are near to one another (in space or time) are perceived as belonging together as a unit | Synonyms: law of proximity |
| (noun) the region close around a person or thing | - |
| proximo | (adjective) in or of the next month after the present | Synonyms: prox |
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