| permutability | (noun) ability to change sequence | Synonyms: permutableness, transposability |
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| permutableness | (noun) ability to change sequence | Synonyms: permutability, transposability |
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| permutation | (noun) complete change in character or condition | - |
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| (noun) the act of changing the arrangement of a given number of elements | - |
| (noun) act of changing the lineal order of objects in a group | - |
| (noun) an event in which one thing is substituted for another | Synonyms: replacement, substitution, switch, transposition |
| perniciousness | (noun) grave harmfulness or deadliness | Synonyms: toxicity |
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| pernio | (noun) inflammation of the hands and feet caused by exposure to cold and moisture | Synonyms: chilblain, chilblains |
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| peroneus | (noun) muscle of the lower leg that is involved in moving the foot | - |
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| peroration | (noun) (rhetoric) the concluding section of an oration | - |
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| (noun) a flowery and highly rhetorical oration | - |
| peroxidase | (noun) any of a group of enzymes (occurring especially in plant cells) that catalyze the oxidation of a compound by a peroxide | - |
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| peroxide | (noun) a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels | Synonyms: hydrogen peroxide |
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| (noun) an inorganic compound containing the divalent ion -O-O- | - |
| perpendicular | (noun) an extremely steep face | - |
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| (noun) a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point | Synonyms: plumb line |
| (noun) a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting | Synonyms: English-Gothic, English-Gothic architecture, perpendicular style |
| (noun) a straight line at right angles to another line | - |
| perpendicularity | (noun) the quality of being at right angles to a given line or plane (especially the plane of the horizon) | - |
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| (noun) the relation of opposition between things at right angles | Synonyms: orthogonal opposition, orthogonality |
| perpetration | (noun) the act of committing a crime | Synonyms: commission, committal |
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| perpetrator | (noun) someone who perpetrates wrongdoing | Synonyms: culprit |
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| perpetuation | (noun) the act of prolonging something | Synonyms: lengthening, prolongation, protraction |
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| perpetuity | (noun) the property of being perpetual (seemingly ceaseless) | Synonyms: sempiternity |
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| perphenazine | (noun) tranquilizer and antidepressant (trade name Triavil) sometimes used as an antiemetic for adults | Synonyms: Triavil |
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| perplexity | (noun) trouble or confusion resulting from complexity | - |
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| perquisite | (noun) a right reserved exclusively by a particular person or group (especially a hereditary or official right) | Synonyms: exclusive right, prerogative, privilege |
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| (noun) an incidental benefit awarded for certain types of employment (especially if it is regarded as a right) | Synonyms: fringe benefit, perk |
| perry | (noun) a fermented and often effervescent beverage made from juice of pears; similar in taste to hard cider | - |
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| persecution | (noun) the act of persecuting (especially on the basis of race or religion) | - |
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| persecutor | (noun) someone who torments | Synonyms: tormenter, tormentor |
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| perseverance | (noun) the act of persisting or persevering; continuing or repeating behavior | Synonyms: perseveration, persistence |
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| (noun) persistent determination | Synonyms: doggedness, persistence, persistency, pertinacity, tenaciousness, tenacity |
| perseveration | (noun) the act of persisting or persevering; continuing or repeating behavior | Synonyms: perseverance, persistence |
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| (noun) the tendency for a memory or idea to persist or recur without any apparent stimulus for it | - |
| persicot | (noun) a cordial made of the kernels of apricots, nectarines, etc., with refined spirit. | - |
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| persiflage | (noun) light teasing | - |
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| persimmon | (noun) orange fruit resembling a plum; edible when fully ripe | - |
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| (noun) any of several tropical trees of the genus Diospyros | Synonyms: persimmon tree |
| persistence | (noun) the act of persisting or persevering; continuing or repeating behavior | Synonyms: perseverance, perseveration |
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| (noun) persistent determination | Synonyms: doggedness, perseverance, persistency, pertinacity, tenaciousness, tenacity |
| (noun) the property of a continuous and connected period of time | Synonyms: continuity |
| persistency | (noun) persistent determination | Synonyms: doggedness, perseverance, persistence, pertinacity, tenaciousness, tenacity |
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| person | (noun) a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential | Synonyms: individual, mortal, somebody, someone, soul |
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| (noun) a human body (usually including the clothing) | - |
| (noun) a grammatical category used in the classification of pronouns, possessive determiners, and verb forms according to whether they indicate the speaker, the addressee, or a third party | - |
| persona | (noun) (Jungian psychology) a personal facade that one presents to the world | Synonyms: image |
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| (noun) an actor's portrayal of someone in a play | Synonyms: character, part, role, theatrical role |
| personableness | (noun) the complex of attributes that make a person socially attractive | - |
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| personage | (noun) another word for person; a person not meriting identification | - |
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| (noun) a person whose actions and opinions strongly influence the course of events | Synonyms: important person, influential person |
| personal | (noun) a short newspaper article about a particular person or group | - |
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| personality | (noun) the complex of all the attributes--behavioral, temperamental, emotional and mental--that characterize a unique individual | - |
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| (noun) a person of considerable prominence | - |
| personalty | (noun) movable property (as distinguished from real estate) | Synonyms: personal estate, personal property, private property |
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| personation | (noun) imitating the mannerisms of another person | Synonyms: impersonation |
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| (noun) acting the part of a character on stage; dramatically representing the character by speech and action and gesture | Synonyms: characterization, enactment, portrayal |
| personhood | (noun) being a person | - |
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| personification | (noun) the act of attributing human characteristics to abstract ideas etc. | Synonyms: incarnation |
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| (noun) representing an abstract quality or idea as a person or creature | Synonyms: prosopopoeia |
| (noun) a person who represents an abstract quality | - |
| personnel | (noun) group of people willing to obey orders | Synonyms: force |
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| (noun) the department responsible for hiring and training and placing employees and for setting policies for personnel management | Synonyms: personnel department, personnel office, staff office |
| perspective | (noun) the appearance of things relative to one another as determined by their distance from the viewer | Synonyms: linear perspective |
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| (noun) a way of regarding situations or topics etc. | Synonyms: position, view |
| perspicaciousness | (noun) intelligence manifested by being astute (as in business dealings) | Synonyms: astuteness, perspicacity, shrewdness |
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| perspicacity | (noun) the capacity to assess situations or circumstances shrewdly and to draw sound conclusions | Synonyms: judgement, judgment, sound judgement, sound judgment |
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| (noun) intelligence manifested by being astute (as in business dealings) | Synonyms: astuteness, perspicaciousness, shrewdness |
| perspicuity | (noun) clarity as a consequence of being perspicuous | Synonyms: perspicuousness, plainness |
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| perspicuousness | (noun) clarity as a consequence of being perspicuous | Synonyms: perspicuity, plainness |
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| perspiration | (noun) salty fluid secreted by sweat glands | Synonyms: sudor, sweat |
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| (noun) the process of the sweat glands of the skin secreting a salty fluid | Synonyms: diaphoresis, hidrosis, sudation, sweating |
| perspirer | (noun) a person who perspires | Synonyms: sweater |
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| persuader | (noun) someone who tries to persuade or induce or lead on | Synonyms: inducer |
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| persuasion | (noun) a personal belief or judgment that is not founded on proof or certainty | Synonyms: opinion, sentiment, thought, view |
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| (noun) the act of persuading (or attempting to persuade); communication intended to induce belief or action | Synonyms: suasion |
| persuasiveness | (noun) the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty | Synonyms: strength |
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| pertainym | (noun) meaning relating to or pertaining to | - |
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| pertinacity | (noun) persistent determination | Synonyms: doggedness, perseverance, persistence, persistency, tenaciousness, tenacity |
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| pertinence | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: applicability, pertinency |
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| pertinency | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: applicability, pertinence |
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| pertness | (noun) inappropriate playfulness | Synonyms: archness, impertinence, perkiness, sauciness |
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| (noun) quality of being lively and confident | - |
| perturbation | (noun) the act of causing disorder | Synonyms: disruption |
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| (noun) a disposition that is confused or nervous and upset | Synonyms: fluster |
| (noun) activity that is a malfunction, intrusion, or interruption | Synonyms: disturbance |
| (noun) (physics) a secondary influence on a system that causes it to deviate slightly | - |
| (noun) an unhappy and worried mental state | Synonyms: disturbance, upset |
| pertussis | (noun) a disease of the respiratory mucous membrane | Synonyms: whooping cough |
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| peruke | (noun) a wig for men that was fashionable in the 17th and 18th centuries | Synonyms: periwig |
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| perusal | (noun) reading carefully with intent to remember | Synonyms: perusing, poring over, studying |
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| perusing | (noun) reading carefully with intent to remember | Synonyms: perusal, poring over, studying |
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| perv | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perve, pervert |
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| pervaporation | (noun) the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off | - |
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| pervasion | (noun) the process of permeating or infusing something with a substance | Synonyms: permeation, suffusion |
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| pervasiveness | (noun) the quality of filling or spreading throughout | - |
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| perve | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perv, pervert |
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| perverseness | (noun) deliberate and stubborn unruliness and resistance to guidance or discipline | Synonyms: contrariness, perversity |
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| (noun) deliberately deviating from what is good | Synonyms: perversity |
| perversion | (noun) the action of perverting something (turning it to a wrong use) | - |
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| (noun) an aberrant sexual practice | Synonyms: sexual perversion |
| (noun) a curve that reverses the direction of something | - |
| perversity | (noun) deliberately deviating from what is good | Synonyms: perverseness |
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| (noun) deliberate and stubborn unruliness and resistance to guidance or discipline | Synonyms: contrariness, perverseness |
| pervert | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perv, perve |
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| perviousness | (noun) the quality of being penetrable (by people or light or missiles etc.) | Synonyms: penetrability |
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| pes | (noun) the part of the leg of a human being below the ankle joint | Synonyms: foot, human foot |
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| pesantran | (noun) a Muslim school in Indonesia operated by religious leaders | Synonyms: pesantren |
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| pesantren | (noun) a Muslim school in Indonesia operated by religious leaders | Synonyms: pesantran |
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| peseta | (noun) formerly the basic unit of money in Spain; equal to 100 centimos | Synonyms: Spanish peseta |
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| pesewa | (noun) 100 pesewas equal 1 cedi in Ghana | - |
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| peshmerga | (noun) a member of a Kurdish guerilla organization that fights for a free Kurdish state | - |
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| peso | (noun) the basic unit of money in Colombia; equal to 100 centavos | Synonyms: Colombian peso |
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| (noun) the basic unit of money in Cuba; equal to 100 centavos | Synonyms: Cuban peso |
| (noun) the basic unit of money in the Dominican Republic; equal to 100 centavos | Synonyms: Dominican peso |
| (noun) the basic unit of money in Mexico; equal to 100 centavos | Synonyms: Mexican peso |
| (noun) the basic unit of money in the Philippines; equal to 100 centavos | Synonyms: Philippine peso |
| (noun) the basic unit of money in Uruguay; equal to 100 centesimos | Synonyms: Uruguayan peso |
| (noun) the basic unit of money in Chile; equal to 100 centesimos | Synonyms: Chilean peso |
| (noun) the basic unit of money in Guinea-Bissau; equal to 100 centavos | Synonyms: Guinea-Bissau peso |
| pessary | (noun) a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix | Synonyms: contraceptive diaphragm, diaphragm |
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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 | - |
| pessimist | (noun) a person who expects the worst | - |
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| pest | (noun) any unwanted and destructive insect or other animal that attacks food or crops or livestock etc. | - |
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| (noun) a persistently annoying person | Synonyms: blighter, cuss, gadfly, pesterer |
| (noun) any epidemic disease with a high death rate | Synonyms: pestilence, plague |
| (noun) a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal | Synonyms: pestilence, pestis, plague |
| pesterer | (noun) a persistently annoying person | Synonyms: blighter, cuss, gadfly, pest |
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| pesthole | (noun) a breeding ground for epidemic disease | - |
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| pesthouse | (noun) hospital for persons with infectious diseases (especially leprosy) | Synonyms: lazar house, lazaret, lazarette, lazaretto |
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| pesticide | (noun) a chemical used to kill pests (as rodents or insects) | - |
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| pestilence | (noun) a pernicious and malign influence that is hard to get rid of | Synonyms: canker |
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| (noun) any epidemic disease with a high death rate | Synonyms: pest, plague |
| (noun) a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal | Synonyms: pest, pestis, plague |
| pestis | (noun) a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal | Synonyms: pest, pestilence, plague |
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| pestle | (noun) a club-shaped hand tool for grinding and mixing substances in a mortar | - |
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| (noun) a heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone | Synonyms: muller, pounder |
| (noun) machine consisting of a heavy bar that moves vertically for pounding or crushing ores | Synonyms: stamp |
| pesto | (noun) a sauce typically served with pasta; contains crushed basil leaves and garlic and pine nuts and Parmesan cheese in olive oil | - |
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| pet | (noun) a domesticated animal kept for companionship or amusement | - |
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| (noun) a fit of petulance or sulkiness (especially at what is felt to be a slight) | - |
| (noun) a special loved one | Synonyms: darling, dearie, deary, ducky, favorite, favourite |
| petabit | (noun) a unit of information equal to 1000 terabits or 10^15 bits | Synonyms: Pb, Pbit |
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| petabyte | (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes | Synonyms: PB, pebibyte, PiB |
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| (noun) a unit of information equal to 1000 terabytes or 10^15 bytes | Synonyms: PB |
| petaflop | (noun) (computer science) a unit for measuring the speed of a computer system, equal to one quadrillion floating-point operations a second. | Synonyms: PFLOPS |
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| petal | (noun) part of the perianth that is usually brightly colored | Synonyms: flower petal |
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| petard | (noun) an explosive device used to break down a gate or wall | - |
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| petchary | (noun) a kingbird that breeds in the southeastern United States and winters in tropical America; similar to but larger than the eastern kingbird | Synonyms: gray kingbird, grey kingbird, Tyrannus domenicensis domenicensis |
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| petcock | (noun) regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining | - |
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| petechia | (noun) a minute red or purple spot on the surface of the skin as the result of tiny hemorrhages of blood vessels in the skin (as in typhoid fever) | - |
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| petfood | (noun) food prepared for animal pets | Synonyms: pet-food, pet food |
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| petiole | (noun) the slender stem that supports the blade of a leaf | Synonyms: leafstalk |
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| petiolule | (noun) the stalk of a leaflet | - |
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