| nightstick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, billystick, truncheon |
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| nonparticipant | (noun) a person who does not participate | - |
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| nonparticipation | (noun) withdrawing from the activities of a group | Synonyms: non-engagement, non-involvement |
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| notice | (noun) the act of noticing or paying attention | Synonyms: observance, observation |
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| (noun) polite or favorable attention | - |
| (noun) a sign posted in a public place as an advertisement | Synonyms: bill, card, placard, poster, posting |
| (noun) an announcement containing information about an event | - |
| (noun) a request for payment | Synonyms: notification |
| (noun) advance notification (usually written) of the intention to withdraw from an arrangement of contract | - |
| (noun) a short critical review | - |
| noticeability | (noun) the property of being easy to see and understand | Synonyms: noticeableness, obviousness, patency |
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| noticeableness | (noun) the property of being easy to see and understand | Synonyms: noticeability, obviousness, patency |
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| noticer | (noun) someone who gives formal notice | - |
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| (noun) someone who takes notice | - |
| numismatics | (noun) the collection and study of money (and coins in particular) | Synonyms: coin collecting, coin collection, numismatology |
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| onomasticon | (noun) a list of proper nouns naming persons or places | - |
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| onomastics | (noun) the branch of lexicology that studies the forms and origins of proper names | - |
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| optic | (noun) the organ of sight | Synonyms: eye, oculus |
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| optician | (noun) a worker who makes glasses for remedying defects of vision | Synonyms: lens maker |
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| optics | (noun) optical properties | - |
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| (noun) the branch of physics that studies the physical properties of light | - |
| orthodontics | (noun) the branch of dentistry dealing with the prevention or correction of irregularities of the teeth | Synonyms: dental orthopaedics, dental orthopedics, orthodontia, orthodonture |
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| orthoptics | (noun) treatment of defects of binocular vision (such as strabismus and amblyopia) by nonsurgical measures (especially by exercises to strengthen the eye muscles) | - |
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| panopticon | (noun) a circular prison with cells distributed around a central surveillance station; proposed by Jeremy Bentham in 1791 | - |
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| (noun) an area where everything is visible | - |
| paralytic | (noun) a person suffering from paralysis | - |
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| parasympathetic | (noun) originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels | Synonyms: parasympathetic nervous system |
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| parenthetical | (noun) an expression in parentheses | Synonyms: parenthetical expression |
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| paretic | (noun) a person afflicted with paresis (partial paralysis) | - |
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| participant | (noun) someone who takes part in an activity | Synonyms: player |
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| (noun) a person who participates in or is skilled at some game | Synonyms: player |
| participation | (noun) the act of sharing in the activities of a group | Synonyms: engagement, involution, involvement |
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| (noun) the condition of sharing in common with others (as fellows or partners etc.) | Synonyms: involvement |
| participial | (noun) a non-finite form of the verb; in English it is used adjectivally and to form compound tenses | Synonyms: participle |
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| participle | (noun) a non-finite form of the verb; in English it is used adjectivally and to form compound tenses | Synonyms: participial |
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| particle | (noun) a function word that can be used in English to form phrasal verbs | - |
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| (noun) a body having finite mass and internal structure but negligible dimensions | Synonyms: subatomic particle |
| (noun) (nontechnical usage) a tiny piece of anything | Synonyms: atom, corpuscle, molecule, mote, speck |
| particular | (noun) a fact about some part (as opposed to general) | Synonyms: specific |
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| (noun) (logic) a proposition that asserts something about some (but not all) members of a class | Synonyms: particular proposition |
| (noun) a small part that can be considered separately from the whole | Synonyms: detail, item |
| particularisation | (noun) an individualized description of a particular instance | Synonyms: detailing, particularization |
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| particularism | (noun) a focus on something particular | - |
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| particularity | (noun) the quality of being particular and pertaining to a specific case or instance | Synonyms: specialness |
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| particularization | (noun) an individualized description of a particular instance | Synonyms: detailing, particularisation |
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| particulate | (noun) a small discrete mass of solid or liquid matter that remains individually dispersed in gas or liquid emissions (usually considered to be an atmospheric pollutant) | Synonyms: particulate matter |
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| pastiche | (noun) a work of art that imitates the style of some previous work | - |
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| (noun) a musical composition consisting of a series of songs or other musical pieces from various sources | Synonyms: medley, potpourri |
| patristics | (noun) the study of the lives, writings, and doctrines of the Church Fathers | Synonyms: patrology |
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| (noun) the writings of the early Church Fathers | Synonyms: patrology |
| periodontics | (noun) the branch of dentistry dealing with diseases of the gums and other structures around the teeth | Synonyms: periodontia |
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| peripatetic | (noun) a person who walks from place to place | - |
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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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| pesticide | (noun) a chemical used to kill pests (as rodents or insects) | - |
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| petticoat | (noun) undergarment worn under a skirt | Synonyms: half-slip, underskirt |
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| pharmaceutic | (noun) drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment | Synonyms: pharmaceutical |
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| pharmaceutical | (noun) drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment | Synonyms: pharmaceutic |
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| pharmaceutics | (noun) the art and science of preparing and dispensing drugs and medicines | Synonyms: pharmacy |
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| pharmacogenetics | (noun) the branch of genetics that studies the genetically determined variations in responses to drugs in humans or laboratory organisms | - |
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| pharmacokinetics | (noun) the study of the action of drugs in the body: method and rate of excretion, duration of effect, etc. | - |
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| phonetician | (noun) a specialist in phonetics | - |
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| phonetics | (noun) the branch of acoustics concerned with speech processes including its production and perception and acoustic analysis | - |
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| pigsticking | (noun) the sport of hunting wild boar with spears | - |
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| plastic | (noun) a card (usually plastic) that assures a seller that the person using it has sufficient means of payment and that the issuer will see to it that the seller receives payment for the merchandise delivered | Synonyms: charge card, charge plate |
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| (noun) generic name for certain synthetic or semisynthetic materials that can be molded or extruded into objects or films or filaments or used for making e.g. coatings and adhesives | - |
| plasticiser | (noun) a substance added to plastics or other materials to make them more pliable | Synonyms: plasticizer |
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| plasticity | (noun) the property of being physically malleable; the property of something that can be worked or hammered or shaped without breaking | Synonyms: malleability |
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| plasticizer | (noun) a substance added to plastics or other materials to make them more pliable | Synonyms: plasticiser |
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| pneumatics | (noun) the branch of mechanics that deals with the mechanical properties of gases | - |
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| poeticism | (noun) a poetic phrase, utterance, etc. | - |
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| poetics | (noun) study of poetic works | - |
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| politicalness | (noun) The state or quality of concerning or being related to politics, the art and process of governing. | - |
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| politician | (noun) a person active in party politics | Synonyms: pol, political leader, politico |
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| (noun) a leader engaged in civil administration | - |
| (noun) a schemer who tries to gain advantage in an organization in sly or underhanded ways | - |
| politico | (noun) a person active in party politics | Synonyms: pol, political leader, politician |
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| politics | (noun) the profession devoted to governing and to political affairs | - |
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| (noun) the activities and affairs involved in managing a state or a government | - |
| (noun) the study of government of states and other political units | Synonyms: government, political science |
| (noun) the opinion you hold with respect to political questions | Synonyms: political sympathies |
| (noun) social relations involving intrigue to gain authority or power | Synonyms: political relation |
| portico | (noun) a porch or entrance to a building consisting of a covered and often columned area | - |
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| postiche | (noun) something that is a counterfeit; not what it seems to be | Synonyms: fake, sham |
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| (noun) a covering or bunch of human or artificial hair used for disguise or adornment | Synonyms: false hair, hairpiece |
| poultice | (noun) a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc. | Synonyms: cataplasm, plaster |
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| practicability | (noun) the quality of being usable | Synonyms: practicableness |
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| practicableness | (noun) the quality of being usable | Synonyms: practicability |
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| practicality | (noun) concerned with actual use rather than theoretical possibilities | - |
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| practice | (noun) a customary way of operation or behavior | Synonyms: pattern |
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| (noun) systematic training by multiple repetitions | Synonyms: drill, exercise, practice session, recitation |
| (noun) the exercise of a profession | - |
| (noun) translating an idea into action | Synonyms: praxis |
| (noun) knowledge of how something is usually done | - |
| practician | (noun) someone who practices a learned profession | Synonyms: practitioner |
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| pragmatic | (noun) an imperial decree that becomes part of the fundamental law of the land | Synonyms: pragmatic sanction |
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| pragmatics | (noun) the study of language use | - |
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| prentice | (noun) works for an expert to learn a trade | Synonyms: apprentice, learner |
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| probiotic | (noun) a beneficial bacterium found in the intestinal tract of healthy mammals; often considered to be a plant | Synonyms: probiotic bacterium, probiotic flora, probiotic microflora |
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| (noun) A dietary supplement containing live bacteria, usually taken after a course of antibiotics to replenish the damaged gastrointestinal flora. | - |
| problematics | (noun) the uncertainties or difficulties inherent in a situation or plan. | - |
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| proclitic | (noun) a clitic that is associated with a following word. | - |
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| prognostic | (noun) a sign of something about to happen | Synonyms: omen, portent, presage, prodigy, prognostication |
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| prognostication | (noun) knowledge of the future (usually said to be obtained from a divine source) | Synonyms: prophecy, vaticination |
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| (noun) a statement made about the future | Synonyms: forecasting, foretelling, prediction |
| (noun) a sign of something about to happen | Synonyms: omen, portent, presage, prodigy, prognostic |
| prognosticator | (noun) someone who makes predictions of the future (usually on the basis of special knowledge) | Synonyms: forecaster, predictor, soothsayer |
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| propaedeutic | (noun) a course that provides an introduction to an art or science (or to more advanced study generally) | Synonyms: propaedeutics |
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| propaedeutics | (noun) a course that provides an introduction to an art or science (or to more advanced study generally) | Synonyms: propaedeutic |
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| prophylactic | (noun) contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse | Synonyms: condom, rubber, safe, safety |
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| (noun) remedy that prevents or slows the course of an illness or disease | Synonyms: preventative, preventive |
| prosthetics | (noun) the branch of medicine dealing with the production and use of artificial body parts | - |
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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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| psycholinguistics | (noun) the branch of cognitive psychology that studies the psychological basis of linguistic competence and performance | - |
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| psychoneurotic | (noun) a person suffering from neurosis | Synonyms: mental case, neurotic |
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| psychotherapeutics | (noun) the branch of psychiatry concerned with psychological methods | Synonyms: mental hygiene, psychotherapy |
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| psychotic | (noun) a person afflicted with psychosis | Synonyms: psycho, psychotic person |
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| pyrectic | (noun) any substance that can cause a rise in body temperature | Synonyms: pyrogen |
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| quadratic | (noun) a polynomial of the second degree | Synonyms: quadratic polynomial |
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| (noun) an equation in which the highest power of an unknown quantity is a square | Synonyms: quadratic equation |
| quadratics | (noun) a branch of algebra dealing with quadratic equations | - |
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| quantic | (noun) a homogeneous polynomial having at least two variables | - |
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| quartic | (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadrate, biquadratic, fourth power |
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| quasiparticle | (noun) a quantum of energy (in a crystal lattice or other system) that has position and momentum and can in some respects be regarded as a particle | - |
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| radiopharmaceutical | (noun) pharmaceutical consisting of a radioactive compound used in radiation therapy | - |
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| reticence | (noun) the trait of being uncommunicative; not volunteering anything more than necessary | Synonyms: reserve, taciturnity |
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| reticle | (noun) a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument | Synonyms: graticule, reticule |
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| reticulation | (noun) an arrangement resembling a net or network | - |
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| (noun) (photography) the formation of a network of cracks or wrinkles in a photographic emulsion | - |
| reticule | (noun) a woman's drawstring handbag; usually made of net or beading or brocade; used in 18th and 19th centuries | - |
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| (noun) a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument | Synonyms: graticule, reticle |
| reticulocyte | (noun) an immature red blood cell containing a network of filaments or granules | - |
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| reticulum | (noun) the second compartment of the stomach of a ruminant | Synonyms: second stomach |
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| (noun) any fine network (especially one in the body composed of cells or blood vessels) | - |
| rheumatic | (noun) a person suffering with rheumatism | - |
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| robotics | (noun) the area of AI concerned with the practical use of robots | - |
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| romantic | (noun) a soulful or amorous idealist | - |
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| (noun) an artist of the Romantic Movement or someone influenced by Romanticism | Synonyms: romanticist |
| romanticisation | (noun) the act of indulging in sentiment | Synonyms: romanticization, sentimentalisation, sentimentalization |
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