| precalc | (noun) a college-level algebra and trigonometry course that is designed to prepare students for the study of calculus | Synonyms: precalculus |
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| precalculus | (noun) a college-level algebra and trigonometry course that is designed to prepare students for the study of calculus | Synonyms: precalc |
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| precancerous | (adjective) of or relating to a growth that is not malignant but is likely to become so if not treated | - |
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| precarious | (adjective) fraught with danger | Synonyms: parlous, perilous, touch-and-go |
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| (adjective) not secure; beset with difficulties | Synonyms: shaky |
| (adjective) affording no ease or reassurance | Synonyms: unstable |
| precariously | (adverb) in a precarious manner | - |
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| precariousness | (noun) extreme dangerousness | - |
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| (noun) being unsettled or in doubt or dependent on chance | Synonyms: uncertainness, uncertainty |
| precast | (adjective) of structural members especially of concrete; cast into form before being transported to the site of installation | - |
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| precative | (adjective) expressing entreaty or supplication | Synonyms: precatory |
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| precatory | (adjective) expressing entreaty or supplication | Synonyms: precative |
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| precaution | (noun) a precautionary measure warding off impending danger or damage or injury etc. | Synonyms: guard, safeguard |
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| (noun) the trait of practicing caution in advance | - |
| (noun) judiciousness in avoiding harm or danger | Synonyms: care, caution, forethought |
| precautional | (adjective) taken in advance to protect against possible danger or failure | Synonyms: precautionary |
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| precautionary | (adjective) taken in advance to protect against possible danger or failure | Synonyms: precautional |
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| precava | (noun) receives blood from the head and arms and chest and empties into the right atrium of the heart; formed from the azygos and both brachiocephalic veins | Synonyms: superior vena cava |
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| precede | (verb) furnish with a preface or introduction | Synonyms: introduce, preface, premise |
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| (verb) move ahead (of others) in time or space | Synonyms: lead |
| (verb) be the predecessor of | Synonyms: come before |
| (verb) be earlier in time; go back further | Synonyms: antecede, antedate, forego, forgo, predate |
| (verb) come before | Synonyms: predate |
| precedence | (noun) the act of preceding in time or order or rank (as in a ceremony) | Synonyms: precedency, precession |
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| (noun) preceding in time | Synonyms: antecedence, antecedency, anteriority, precedency, priority |
| (noun) status established in order of importance or urgency | Synonyms: precedency, priority |
| precedency | (noun) the act of preceding in time or order or rank (as in a ceremony) | Synonyms: precedence, precession |
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| (noun) preceding in time | Synonyms: antecedence, antecedency, anteriority, precedence, priority |
| (noun) status established in order of importance or urgency | Synonyms: precedence, priority |
| precedent | (adjective) preceding in time, order, or significance | - |
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| (noun) an example that is used to justify similar occurrences at a later time | Synonyms: case in point |
| (noun) (civil law) a law established by following earlier judicial decisions | Synonyms: case law, common law |
| (noun) a subject mentioned earlier (preceding in time) | - |
| (noun) a system of jurisprudence based on judicial precedents rather than statutory laws | Synonyms: case law, common law |
| precedented | (adjective) having or supported or justified by a precedent | - |
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| precedentedly | (adverb) with precedent | - |
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| precedential | (adjective) having precedence (especially because of longer service) | - |
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| preceding | (adjective) existing or coming before | - |
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| (adjective) of a person who has held and relinquished a position or office | Synonyms: past, retiring |
| precentor | (noun) the musical director of a choir | Synonyms: cantor, choirmaster |
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| precentorship | (noun) the position of precentor | - |
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| precept | (noun) a doctrine that is taught | Synonyms: commandment, teaching |
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| (noun) rule of personal conduct | Synonyms: principle |
| preceptor | (noun) teacher at a university or college (especially at Cambridge or Oxford) | Synonyms: don |
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| preceptorship | (noun) the position of preceptor | - |
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| precess | (verb) move in a gyrating fashion | - |
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| precession | (noun) the act of preceding in time or order or rank (as in a ceremony) | Synonyms: precedence, precedency |
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| (noun) the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone | - |
| prechlorination | (noun) chlorination prior to another chemical process | - |
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| precinct | (noun) a district of a city or town marked out for administrative purposes | - |
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| preciosity | (noun) the quality of being fastidious or excessively refined | Synonyms: preciousness |
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| precious | (adjective) obviously contrived to charm | Synonyms: cute |
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| (adjective) characterized by feeling or showing fond affection for | Synonyms: cherished, treasured, wanted |
| (adjective) of high worth or cost | - |
| (adjective) held in great esteem for admirable qualities especially of an intrinsic nature | Synonyms: valued |
| (adverb) very | Synonyms: preciously |
| preciously | (adverb) very | Synonyms: precious |
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| preciousness | (noun) the positive quality of being precious and beyond value | Synonyms: invaluableness, pricelessness, valuableness |
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| (noun) the quality of being fastidious or excessively refined | Synonyms: preciosity |
| (noun) the quality possessed by something with a great price or value | Synonyms: costliness, dearness |
| precipice | (noun) a very steep cliff | - |
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| precipitance | (noun) the quality of happening with headlong haste or without warning | Synonyms: abruptness, precipitancy, precipitateness, precipitousness, suddenness |
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| precipitancy | (noun) the quality of happening with headlong haste or without warning | Synonyms: abruptness, precipitance, precipitateness, precipitousness, suddenness |
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| precipitant | (adjective) done with very great haste and without due deliberation | Synonyms: hasty, overhasty, precipitate, precipitous |
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| (noun) an agent that causes a precipitate to form | - |
| precipitate | (adjective) done with very great haste and without due deliberation | Synonyms: hasty, overhasty, precipitant, precipitous |
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| (noun) a precipitated solid substance in suspension or after settling or filtering | - |
| (verb) separate as a fine suspension of solid particles | - |
| (verb) hurl or throw violently | - |
| (verb) bring about abruptly | - |
| (verb) fall vertically, sharply, or headlong | - |
| (verb) fall from clouds | Synonyms: come down, fall |
| precipitately | (adverb) at breakneck speed | Synonyms: headlong |
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| precipitateness | (noun) the quality of happening with headlong haste or without warning | Synonyms: abruptness, precipitance, precipitancy, precipitousness, suddenness |
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| precipitating | (adjective) bringing on suddenly or abruptly | - |
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| precipitation | (noun) an unexpected acceleration or hastening | - |
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| (noun) overly eager speed (and possible carelessness) | Synonyms: haste, hastiness, hurriedness, hurry |
| (noun) the act of casting down or falling headlong from a height | - |
| (noun) the falling to earth of any form of water (rain or snow or hail or sleet or mist) | Synonyms: downfall |
| (noun) the process of forming a chemical precipitate | - |
| (noun) the quantity of water falling to earth at a specific place within a specified period of time | - |
| precipitator | (noun) removes dust particles from gases by electrostatic precipitation | Synonyms: Cottrell precipitator, electrostatic precipitator |
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| precipitin | (noun) an antibody that causes precipitation when it unites with its antigen | - |
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| precipitous | (adjective) done with very great haste and without due deliberation | Synonyms: hasty, overhasty, precipitant, precipitate |
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| (adjective) dangerously steep | Synonyms: abrupt, sharp |
| precipitously | (adverb) abruptly; in a precipitous manner | - |
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| (adverb) very suddenly and to a great degree | Synonyms: sharply |
| precipitousness | (noun) the property possessed by a slope that is very steep | Synonyms: abruptness, steepness |
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| (noun) the quality of happening with headlong haste or without warning | Synonyms: abruptness, precipitance, precipitancy, precipitateness, suddenness |
| precis | (noun) a sketchy summary of the main points of an argument or theory | Synonyms: abstract, outline, synopsis |
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| (verb) make a summary (of) | - |
| precise | (adjective) sharply exact or accurate or delimited | - |
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| (adjective) (of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth; strictly correct | Synonyms: accurate, exact |
| precisely | (adverb) indicating exactness or preciseness | Synonyms: exactly, just, properly |
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| (adverb) in a precise manner | Synonyms: exactly, incisively |
| (adverb) just as it should be | Synonyms: exactly, on the button, on the dot, on the nose |
| preciseness | (noun) the quality of being reproducible in amount or performance | Synonyms: precision |
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| (noun) clarity as a consequence of precision | Synonyms: clearcutness |
| precision | (noun) the quality of being reproducible in amount or performance | Synonyms: preciseness |
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| preclinical | (adjective) of or relating to the early phases of a disease when accurate diagnosis is not possible because symptoms of the disease have not yet appeared | Synonyms: presymptomatic |
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| preclude | (verb) keep from happening or arising; make impossible | Synonyms: forbid, foreclose, forestall, prevent |
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| (verb) make impossible, especially beforehand | Synonyms: close out, rule out |
| preclusion | (noun) the act of preventing something by anticipating and disposing of it effectively | Synonyms: forestalling, obviation |
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| preclusive | (adjective) made impossible | Synonyms: obviating |
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| precocial | (adjective) (of hatchlings) covered with down and having eyes open; capable of leaving the nest within a few days | - |
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| precocious | (adjective) characterized by or characteristic of exceptionally early development or maturity (especially in mental aptitude) | - |
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| (adjective) appearing or developing early | - |
| precociously | (adverb) in a precocious manner | - |
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| precociousness | (noun) intelligence achieved far ahead of normal developmental schedules | Synonyms: precocity |
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| precocity | (noun) intelligence achieved far ahead of normal developmental schedules | Synonyms: precociousness |
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| precognition | (noun) knowledge of an event before it occurs | Synonyms: foreknowledge |
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| precognitive | (adjective) foreseeing the future | Synonyms: clairvoyant, second-sighted |
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| preconceive | (verb) conceive beforehand | - |
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| preconceived | (adjective) (of an idea or opinion) formed beforehand; especially without evidence or through prejudice | - |
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| preconception | (noun) an opinion formed beforehand without adequate evidence | Synonyms: parti pris, preconceived idea, preconceived notion, preconceived opinion, prepossession |
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| (noun) a partiality that prevents objective consideration of an issue or situation | Synonyms: bias, prejudice |
| preconcerted | (adjective) previously arranged or agreed on | - |
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| precondition | (noun) a condition that is a prerequisite | - |
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| (noun) an assumption that is taken for granted | Synonyms: given, presumption |
| (noun) an assumption on which rests the validity or effect of something else | Synonyms: condition, stipulation |
| (verb) put into the required condition beforehand | - |
| preconditioned | (adjective) having already been put into a suitable condition | - |
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| precook | (verb) cook beforehand so that the actual preparation won't take long | - |
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| precooked | (adjective) cooked partially or completely beforehand | - |
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| precooled | (adjective) cooled in advance | - |
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| precordial | (adjective) in front of the heart; involving the precordium | - |
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| precordium | (noun) the external surface of the body overlying the heart and stomach | - |
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| precursor | (noun) something that precedes and indicates the approach of something or someone | Synonyms: forerunner, harbinger, herald, predecessor |
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| (noun) a person who goes before or announces the coming of another | Synonyms: forerunner |
| (noun) a substance from which another substance is formed (especially by a metabolic reaction) | - |
| precursory | (adjective) warning of future misfortune | Synonyms: premonitory |
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