| prospective | (adjective) of or concerned with or related to the future | - |
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| prospectiveness | (noun) The quality of relating to or furnishing a future prospect. | - |
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| prospector | (noun) someone who explores an area for mineral deposits | - |
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| prospectus | (noun) a catalog listing the courses offered by a college or university | Synonyms: course catalog, course catalogue |
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| (noun) a formal written offer to sell securities (filed with the SEC) that sets forth a plan for a (proposed) business enterprise | - |
| prosper | (verb) make steady progress; be at the high point in one's career or reach a high point in historical significance or importance | Synonyms: flourish, fly high, thrive |
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| prospering | (adjective) very lively and profitable | Synonyms: booming, burgeoning, flourishing, palmy, prosperous, roaring, thriving |
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| prosperity | (noun) the condition of prospering; having good fortune | Synonyms: successfulness |
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| (noun) an economic state of growth with rising profits and full employment | - |
| prosperous | (adjective) marked by peace and prosperity | Synonyms: golden, halcyon |
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| (adjective) presaging or likely to bring good luck or a good outcome | Synonyms: favorable, favourable, golden, lucky |
| (adjective) in fortunate circumstances financially; moderately rich | Synonyms: comfortable, easy, well-fixed, well-heeled, well-off, well-situated, well-to-do |
| (adjective) very lively and profitable | Synonyms: booming, burgeoning, flourishing, palmy, prospering, roaring, thriving |
| prosperously | (adverb) in the manner of prosperous people | - |
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| prospicience | (noun) seeing ahead; knowing in advance; foreseeing | Synonyms: farsightedness, foresight, prevision |
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| prospicient | (adjective) planning prudently for the future | Synonyms: farseeing, farsighted, foresighted, foresightful, long, longsighted |
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| prostaglandin | (noun) a potent substance that acts like a hormone and is found in many bodily tissues (and especially in semen); produced in response to trauma and may affect blood pressure and metabolism and smooth muscle activity | - |
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| prostate | (adjective) relating to the prostate gland | Synonyms: prostatic |
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| (noun) a firm partly muscular chestnut sized gland in males at the neck of the urethra; produces a viscid secretion that is the fluid part of semen | Synonyms: prostate gland |
| prostatectomy | (noun) surgical removal of part or all of the prostate gland | - |
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| prostatic | (adjective) relating to the prostate gland | Synonyms: prostate |
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| prostatitis | (noun) inflammation of the prostate gland characterized by perineal pain and irregular urination and (if severe) chills and fever | - |
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| prostheon | (noun) craniometric point that is the most anterior point in the midline on the alveolar process of the maxilla | Synonyms: alveolar point, prosthion |
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| prosthesis | (noun) corrective consisting of a replacement for a part of the body | Synonyms: prosthetic device |
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| prosthetic | (adjective) relating to or serving as a prosthesis | - |
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| (adjective) of or relating to prosthetics | - |
| prosthetics | (noun) the branch of medicine dealing with the production and use of artificial body parts | - |
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| prosthetist | (noun) an expert in prosthetics | - |
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| prosthion | (noun) craniometric point that is the most anterior point in the midline on the alveolar process of the maxilla | Synonyms: alveolar point, prostheon |
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| prosthodontia | (noun) the branch of dentistry dealing with the replacement of teeth and related mouth or jaw structures by artificial devices | Synonyms: prosthodontics |
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| prosthodontic | (adjective) of or relating to prosthodontics | - |
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| prosthodontics | (noun) the branch of dentistry dealing with the replacement of teeth and related mouth or jaw structures by artificial devices | Synonyms: prosthodontia |
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| prosthodontist | (noun) a dentist who is expert in prosthodontics | - |
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| prostitute | (noun) a woman who engages in sexual intercourse for money | Synonyms: bawd, cocotte, cyprian, fancy woman, harlot, lady of pleasure, sporting lady, tart, whore, woman of the street, working girl |
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| (verb) sell one's body; exchange sex for money | - |
| prostitution | (noun) offering sexual intercourse for pay | Synonyms: harlotry, whoredom |
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| prostrate | (adjective) stretched out and lying at full length along the ground | Synonyms: flat |
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| (adjective) lying face downward | Synonyms: prone |
| (verb) render helpless or defenseless | - |
| (verb) throw down flat, as on the ground | - |
| (verb) get into a prostrate position, as in submission | Synonyms: bow down |
| prostration | (noun) the act of assuming a prostrate position | - |
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| (noun) abject submission; the emotional equivalent of prostrating your body | - |
| (noun) an abrupt failure of function or complete physical exhaustion | Synonyms: collapse |
| prostyle | (adjective) marked by columniation having free columns in a portico only across the opening to the structure | Synonyms: pseudoprostyle |
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| prosy | (adjective) lacking wit or imagination | Synonyms: earthbound, pedestrian, prosaic |
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| protactinium | (noun) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead | Synonyms: atomic number 91, Pa, protoactinium |
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| protagonism | (noun) active support of an idea or cause etc.; especially the act of pleading or arguing for something | Synonyms: advocacy |
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| protagonist | (noun) a person who backs a politician or a team etc. | Synonyms: admirer, booster, champion, friend, supporter |
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| (noun) the principal character in a work of fiction | Synonyms: agonist |
| protamine | (noun) a simple protein found in fish sperm; rich in arginine; simpler in composition than globulin or albumin; counteracts the anticoagulant effect of heparin | - |
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| protanopia | (noun) dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue | Synonyms: red-blindness |
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| protanopic | (adjective) inability to see the color red or to distinguish red and bluish-green | Synonyms: red-blind |
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| protea | (noun) any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones | - |
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| protean | (adjective) taking on different forms | - |
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| protease | (noun) any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis | Synonyms: peptidase, proteinase, proteolytic enzyme |
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| protect | (verb) shield from danger, injury, destruction, or damage | - |
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| (verb) use tariffs to favor domestic industry | - |
| protected | (adjective) kept safe or defended from danger or injury or loss | - |
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| (adjective) guarded from injury or destruction | Synonyms: saved |
| protecting | (adjective) shielding (or designed to shield) against harm or discomfort | - |
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| protection | (noun) the activity of protecting someone or something | - |
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| (noun) payment extorted by gangsters on threat of violence | Synonyms: tribute |
| (noun) kindly endorsement and guidance | Synonyms: aegis, auspices |
| (noun) the imposition of duties or quotas on imports in order to protect domestic industry against foreign competition | Synonyms: trade protection |
| (noun) a covering that is intend to protect from damage or injury | Synonyms: protective cover, protective covering |
| (noun) defense against financial failure; financial independence | Synonyms: security |
| (noun) the condition of being protected | Synonyms: shelter |
| protectionism | (noun) the policy of imposing duties or quotas on imports in order to protect home industries from overseas competition | - |
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| protectionist | (noun) an advocate of protectionism | - |
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| protective | (adjective) intended or adapted to afford protection of some kind | - |
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| (adjective) showing care | - |
| (adjective) (usually followed by `of') solicitously caring or mindful | - |
| protectively | (adverb) in a protective manner | - |
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| protectiveness | (noun) the quality of providing protection | - |
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| (noun) a feeling of protective affection | - |
| protector | (noun) a person who cares for persons or property | Synonyms: defender, guardian, shielder |
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| protectorate | (noun) a state or territory partly controlled by (but not a possession of) a stronger state but autonomous in internal affairs; protectorates are established by treaty | Synonyms: associated state |
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| protectorship | (noun) the position of protector | - |
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| protege | (noun) a person who receives support and protection from an influential patron who furthers the protege's career | - |
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| protegee | (noun) a woman protege | - |
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| protein | (noun) any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes | - |
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| proteinaceous | (adjective) relating to or of the nature of protein | - |
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| proteinase | (noun) any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis | Synonyms: peptidase, protease, proteolytic enzyme |
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| proteinuria | (noun) the presence of excessive protein (chiefly albumin but also globulin) in the urine; usually a symptom of kidney disorder | Synonyms: albuminuria |
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| proteolysis | (noun) the hydrolysis of proteins into peptides and amino acids by cleavage of their peptide bonds | - |
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| proteolytic | (adjective) of or relating to proteolysis | - |
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| proteome | (noun) the full complement of proteins produced by a particular genome | - |
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| proteomics | (noun) the branch of genetics that studies the full set of proteins encoded by a genome | - |
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| proteosome | (noun) a form of vaccine that can be administered by an inhaler | Synonyms: proteosome vaccine |
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| proterozoic | (adjective) formed in the later of two divisions of the Precambrian era | - |
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| protest | (noun) the act of protesting; a public (often organized) manifestation of dissent | Synonyms: dissent, objection |
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| (noun) a formal and solemn declaration of objection | Synonyms: protestation |
| (noun) the act of making a strong public expression of disagreement and disapproval | - |
| (verb) utter words of protest | - |
| (verb) affirm or avow formally or solemnly | - |
| (verb) express opposition through action or words | Synonyms: dissent, resist |
| protestant | (adjective) protesting | - |
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| protestation | (noun) a strong declaration of protest | - |
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| (noun) a formal and solemn declaration of objection | Synonyms: protest |
| protester | (noun) someone who participates in a public display of group feeling | Synonyms: demonstrator |
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| (noun) a person who dissents from some established policy | Synonyms: contestant, dissenter, dissident, objector |
| prothalamion | (noun) a song in celebration of a marriage | Synonyms: prothalamium |
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| prothalamium | (noun) a song in celebration of a marriage | Synonyms: prothalamion |
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| prothorax | (noun) the anterior part of an insect's thorax; bears the first pair of legs | - |
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| prothrombin | (noun) a protein in blood plasma that is the inactive precursor of thrombin | Synonyms: factor II |
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| prothrombinase | (noun) coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors | Synonyms: factor X |
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| protip | (noun) an insightful bit of advice | - |
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| protirelin | (noun) hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary | Synonyms: thyrotropin-releasing factor, thyrotropin-releasing hormone, TRF, TRH |
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| protist | (noun) free-living or colonial organisms with diverse nutritional and reproductive modes | Synonyms: protistan |
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| protistan | (noun) free-living or colonial organisms with diverse nutritional and reproductive modes | Synonyms: protist |
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| proto | (adjective) indicating the first or earliest or original | - |
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| protoactinium | (noun) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead | Synonyms: atomic number 91, Pa, protactinium |
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| protoanthropology | (noun) the study of humans prior to the invention of writing | Synonyms: protohistory |
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| protoarchaeology | (noun) the study of prehistoric human artifacts and human fossils | Synonyms: protoarcheology |
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| protoarcheology | (noun) the study of prehistoric human artifacts and human fossils | Synonyms: protoarchaeology |
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| 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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