| antiparticle | (noun) a particle that has the same mass as another particle but has opposite values for its other properties; interaction of a particle and its antiparticle results in annihilation and the production of radiant energy | - |
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| apar | (noun) South American armadillo with three bands of bony plates | Synonyms: three-banded armadillo, Tolypeutes tricinctus |
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| apartheid | (noun) a social policy or racial segregation involving political and economic and legal discrimination against people who are not Whites; the former official policy in South Africa | - |
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| apartment | (noun) a suite of rooms usually on one floor of an apartment house | Synonyms: flat |
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| apparatchik | (noun) a communist who was a member of the administrative system of a communist party | - |
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| (noun) a humorous but derogatory term for an official of a large organization (especially a political organization) | - |
| apparatus | (noun) equipment designed to serve a specific function | Synonyms: setup |
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| (noun) (anatomy) a group of body parts that work together to perform a given function | - |
| apparel | (noun) clothing in general | Synonyms: clothes, dress, wearing apparel |
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| apparency | (noun) the property of being apparent | Synonyms: apparentness |
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| apparentness | (noun) the property of being apparent | Synonyms: apparency |
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| apparition | (noun) an act of appearing or becoming visible unexpectedly | - |
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| (noun) something existing in perception only | Synonyms: fantasm, phantasm, phantasma, phantom, shadow |
| (noun) the appearance of a ghostlike figure | - |
| (noun) a ghostly appearing figure | Synonyms: fantasm, phantasm, phantasma, phantom, specter, spectre |
| asparaginase | (noun) antineoplastic drug (trade name Elspar) sometimes used to treat lymphoblastic leukemia | Synonyms: Elspar |
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| asparagine | (noun) a crystalline amino acid found in proteins and in many plants (e.g., asparagus) | - |
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| asparagus | (noun) edible young shoots of the asparagus plant | - |
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| (noun) plant whose succulent young shoots are cooked and eaten as a vegetable | Synonyms: Asparagus officinales, edible asparagus |
| aspartame | (noun) an artificial sweetener made from aspartic acid; used as a calorie-free sweetener | - |
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| ballpark | (noun) a facility in which ball games are played (especially baseball games) | Synonyms: park |
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| (noun) near to the scope or range of something | Synonyms: approximate range |
| camelopard | (noun) tallest living quadruped; having a spotted coat and small horns and very long neck and legs; of savannahs of tropical Africa | Synonyms: Giraffa camelopardalis, giraffe |
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| caparison | (noun) stable gear consisting of a decorated covering for a horse, especially (formerly) for a warhorse | Synonyms: housing, trapping |
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| chaparral | (noun) dense vegetation consisting of stunted trees or bushes | Synonyms: bush, scrub |
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| comparability | (noun) qualities that are comparable | Synonyms: compare, comparison, equivalence |
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| comparative | (noun) the comparative form of an adjective or adverb | Synonyms: comparative degree |
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| compare | (noun) qualities that are comparable | Synonyms: comparability, comparison, equivalence |
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| comparing | (noun) the act of examining resemblances | Synonyms: comparison |
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| comparison | (noun) the act of examining resemblances | Synonyms: comparing |
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| (noun) qualities that are comparable | Synonyms: comparability, compare, equivalence |
| (noun) relation based on similarities and differences | - |
| compartment | (noun) a partitioned section, chamber, or separate room within a larger enclosed area | - |
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| (noun) a space into which an area is subdivided | - |
| compartmentalisation | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorisation, categorization, classification, compartmentalization |
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| (noun) a mild state of dissociation | Synonyms: compartmentalization |
| compartmentalization | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorisation, categorization, classification, compartmentalisation |
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| (noun) a mild state of dissociation | Synonyms: compartmentalisation |
| copartner | (noun) a joint partner (as in a business enterprise) | - |
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| copartnership | (noun) a partnership in which employees get a share of the profits in addition to their wages | - |
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| counterpart | (noun) a duplicate copy | Synonyms: similitude, twin |
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| (noun) a person or thing having the same function or characteristics as another | Synonyms: opposite number, vis-a-vis |
| cystoparalysis | (noun) paralysis of the urinary bladder | Synonyms: cystoplegia |
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| departed | (noun) someone who is no longer alive | Synonyms: dead person, dead soul, deceased, deceased person, decedent |
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| departer | (noun) someone who leaves | Synonyms: goer, leaver |
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| department | (noun) a specialized sphere of knowledge | - |
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| (noun) a specialized division of a large organization | Synonyms: section |
| (noun) the territorial and administrative division of some countries (such as France) | - |
| departure | (noun) the act of departing | Synonyms: going, going away, leaving |
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| (noun) euphemistic expressions for death | Synonyms: exit, expiration, going, loss, passing, release |
| (noun) a variation that deviates from the standard or norm | Synonyms: deviation, difference, divergence |
| disparagement | (noun) the act of speaking contemptuously of | Synonyms: dispraise |
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| (noun) a communication that belittles somebody or something | Synonyms: depreciation, derogation |
| disparager | (noun) one who disparages or belittles the worth of something | Synonyms: depreciator, detractor, knocker |
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| disparateness | (noun) utter dissimilarity | Synonyms: distinctiveness |
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| disparity | (noun) inequality or difference in some respect | - |
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| ectoparasite | (noun) any external parasitic organism (as fleas) | Synonyms: ectozoan, ectozoon, epizoan, epizoon |
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| endoparasite | (noun) any of various parasites that live in the internal organs of animals (especially intestinal worms) | Synonyms: endozoan, entoparasite, entozoan, entozoon |
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| entoparasite | (noun) any of various parasites that live in the internal organs of animals (especially intestinal worms) | Synonyms: endoparasite, endozoan, entozoan, entozoon |
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| eparch | (noun) the governor or prefect of an eparchy in ancient Greece | - |
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| (noun) a bishop or metropolitan in charge of an eparchy in the Eastern Church | - |
| eparchy | (noun) a diocese of the Eastern Orthodox Church | Synonyms: exarchate |
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| (noun) a province in ancient Greece | - |
| esparcet | (noun) Eurasian perennial herb having pale pink flowers and curved pods; naturalized in Britain and North America grasslands on calcareous soils; important forage crop and source of honey in Britain | Synonyms: holy clover, Onobrychis viciaefolia, Onobrychis viciifolia, sainfoin, sanfoin |
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| feldspar | (noun) any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium | Synonyms: felspar |
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| felspar | (noun) any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium | Synonyms: feldspar |
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| fissiparity | (noun) the tendency to break into parts | - |
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| (noun) reproduction of some multicellular organisms by division, as in the case of some starfish | - |
| fluorspar | (noun) a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine | Synonyms: fluor, fluorite |
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| forepart | (noun) the side that is forward or prominent | Synonyms: front, front end |
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| godparent | (noun) a person who sponsors someone (the godchild) at baptism | - |
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| grandparent | (noun) a parent of your father or mother | - |
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| hemiparasite | (noun) a parasitic plant that contains some chlorophyll and therefore is capable of photosynthesis | Synonyms: semiparasite |
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| heparin | (noun) a polysaccharide produced in basophils (especially in the lung and liver) and that inhibits the activity of thrombin in coagulation of the blood; it (trade names Lipo-Hepin and Liquaemin) is used as an anticoagulant in the treatment of thrombosis and in heart surgery | Synonyms: Lipo-Hepin, Liquaemin |
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| hyperparathyroidism | (noun) excessive secretion of parathyroid hormone resulting in abnormally high levels of calcium in the blood; can affect many systems of the body (especially causing bone resorption and osteoporosis) | - |
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| hypoparathyroidism | (noun) inadequate secretion of parathyroid hormone resulting in abnormally low levels of calcium in the blood | - |
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| impartation | (noun) the transmission of information | Synonyms: conveyance, imparting |
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| impartiality | (noun) an inclination to weigh both views or opinions equally | Synonyms: nonpartisanship |
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| imparting | (noun) the transmission of information | Synonyms: conveyance, impartation |
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| incomparability | (noun) The quality of being so much better than another as to be beyond comparison. | - |
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| (noun) The condition of not being able to be compared. | - |
| jeopardy | (noun) a source of danger; a possibility of incurring loss or misfortune | Synonyms: endangerment, hazard, peril, risk |
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| laparocele | (noun) hernia through the abdomen | - |
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| laparoscope | (noun) a slender endoscope inserted through an incision in the abdominal wall in order to examine the abdominal organs or to perform minor surgery | - |
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| laparoscopy | (noun) laparotomy performed with a laparoscope that makes a small incision to examine the abdominal cavity (especially the ovaries and Fallopian tubes) | - |
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| laparotomy | (noun) surgical incision into the abdominal wall; often done to examine abdominal organs | - |
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| leopard | (noun) large feline of African and Asian forests usually having a tawny coat with black spots | Synonyms: Panthera pardus |
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| (noun) the pelt of a leopard | - |
| leopardbane | (noun) any of several herbs of the genus Doronicum having alternate often clasping stem leaves cultivated for their long stalks of yellow flower heads | Synonyms: leopard's-bane |
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| leopardess | (noun) female leopard | - |
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| liparis | (noun) an orchid of the genus Liparis having few leaves and usually fairly small yellow-green or dull purple flowers in terminal racemes | - |
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| mouthpart | (noun) any part of the mouth of an insect or other arthropod especially one adapted to a specific way of feeding | - |
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| nonpareil | (noun) colored beads of sugar used as a topping on e.g. candies and cookies | - |
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| (noun) a flat disk of chocolate covered with beads of colored sugar | - |
| (noun) model of excellence or perfection of a kind; one having no equal | Synonyms: apotheosis, ideal, nonesuch, nonsuch, paragon, saint |
| nonpareille | (noun) a 6-point printing type: a size smaller than minion. | - |
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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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| nonpartisan | (noun) a person who is nonpartisan | Synonyms: nonpartizan |
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| nonpartisanship | (noun) an inclination to weigh both views or opinions equally | Synonyms: impartiality |
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| nonpartizan | (noun) a person who is nonpartisan | Synonyms: nonpartisan |
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| nullipara | (noun) (obstetrics) a woman who has never give birth to a child | - |
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| paparazzo | (noun) a freelance photographer who pursues celebrities trying to take candid photographs of them to sell to newspapers or magazines | - |
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| par | (noun) (golf) the standard number of strokes set for each hole on a golf course, or for the entire course | - |
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| (noun) a state of being essentially equal or equivalent; equally balanced | Synonyms: equality, equation, equivalence |
| para | (noun) a soldier in the paratroops | Synonyms: paratrooper |
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| (noun) 100 para equal 1 dinar in Yugoslavia | - |
| (noun) (obstetrics) the number of liveborn children a woman has delivered | Synonyms: parity |
| parable | (noun) a short moral story (often with animal characters) | Synonyms: allegory, apologue, fable |
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| (noun) (New Testament) any of the stories told by Jesus to convey his religious message | - |
| parabola | (noun) a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve | - |
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| parabolograph | (noun) An outdated instrument for drawing parabolas. | - |
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| paraboloid | (noun) a surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis | - |
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| paracentesis | (noun) centesis of the belly to remove fluid for diagnosis | Synonyms: abdominocentesis |
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| parachute | (noun) rescue equipment consisting of a device that fills with air and retards your fall | Synonyms: chute |
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| parachuter | (noun) a person who jumps from aircraft using a parachute | Synonyms: parachute jumper, parachutist |
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| parachuting | (noun) descent with a parachute | Synonyms: jump |
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| parachutist | (noun) a person who jumps from aircraft using a parachute | Synonyms: parachute jumper, parachuter |
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| paracosm | (noun) a prolonged fantasy world invented by children; can have a definite geography and language and history | - |
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| parade | (noun) a visible display | - |
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| (noun) a ceremonial procession including people marching | - |
| (noun) an extended (often showy) succession of persons or things | - |
| parader | (noun) walks with regular or stately step | Synonyms: marcher |
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| paradiddle | (noun) the sound of a drum (especially a snare drum) beaten rapidly and continuously | Synonyms: drum roll, roll |
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| paradigm | (noun) a standard or typical example | Synonyms: epitome, image, prototype |
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| (noun) the generally accepted perspective of a particular discipline at a given time | - |
| (noun) the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another) | Synonyms: substitution class |
| (noun) systematic arrangement of all the inflected forms of a word | - |
| paradise | (noun) any place of complete bliss and delight and peace | Synonyms: Eden, heaven, nirvana, promised land, Shangri-la |
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| paradox | (noun) (logic) a statement that contradicts itself | - |
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| paraesthesia | (noun) abnormal skin sensations (as tingling or tickling or itching or burning) usually associated with peripheral nerve damage | Synonyms: paresthesia |
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| paraffin | (noun) from crude petroleum; used for candles and for preservative or waterproof coatings | Synonyms: paraffin wax |
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| (noun) (British usage) kerosine | Synonyms: paraffin oil |
| (noun) a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2) | Synonyms: alkane, alkane series, methane series, paraffin series |
| parafovea | (noun) area of the retina immediately surrounding the fovea | - |
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| paragliding | (noun) gliding in a parasail | Synonyms: parasailing |
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