| alloantibody | (noun) an antibody that occurs naturally against foreign tissues from a person of the same species | Synonyms: isoantibody |
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| allocation | (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allotment, apportioning, apportionment, assignation, parceling, parcelling |
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| (noun) (computer science) the assignment of particular areas of a magnetic disk to particular data or instructions | Synonyms: storage allocation |
| (noun) a share set aside for a specific purpose | Synonyms: allotment |
| allocator | (noun) a person with authority to allot or deal out or apportion | Synonyms: distributor |
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| allocution | (noun) (rhetoric) a formal or authoritative address that advises or exhorts | - |
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| allogamy | (noun) cross-fertilization in plants | - |
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| allograft | (noun) tissue or organ transplanted from a donor of the same species but different genetic makeup; recipient's immune system must be suppressed to prevent rejection of the graft | Synonyms: homograft |
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| allograph | (noun) a variant form of a grapheme, as `m' or `M' or a handwritten version of that grapheme | - |
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| (noun) a signature written by one person for another | - |
| allomerism | (noun) (chemistry) variability in chemical composition without variation in crystalline form | - |
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| allometry | (noun) the study of the relative growth of a part of an organism in relation to the growth of the whole | - |
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| allomorph | (noun) a variant phonological representation of a morpheme | - |
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| (noun) any of several different crystalline forms of the same chemical compound | - |
| allopathy | (noun) the usual method of treating disease with remedies that produce effects differing from those produced by the disease itself | - |
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| allopatry | (noun) the occurrence of related organisms in separate geographical areas with no overlap | - |
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| allophone | (noun) (linguistics) any of various acoustically different forms of the same phoneme | - |
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| allopurinol | (noun) a drug (trade name Zyloprim) used to treat gout and other conditions in which there is an excessive buildup of uric acid | Synonyms: Zyloprim |
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| allosaur | (noun) late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus | Synonyms: allosaurus |
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| allosaurus | (noun) late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus | Synonyms: allosaur |
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| allotment | (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allocation, apportioning, apportionment, assignation, parceling, parcelling |
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| (noun) a share set aside for a specific purpose | Synonyms: allocation |
| allotrope | (noun) a structurally different form of an element | - |
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| allotropism | (noun) the phenomenon of an element existing in two or more physical forms | Synonyms: allotropy |
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| allotropy | (noun) the phenomenon of an element existing in two or more physical forms | Synonyms: allotropism |
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| allowance | (noun) the act of allowing | - |
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| (noun) a permissible difference; allowing some freedom to move within limits | Synonyms: leeway, margin, tolerance |
| (noun) an amount allowed or granted (as during a given period) | - |
| (noun) an amount added or deducted on the basis of qualifying circumstances | Synonyms: adjustment |
| (noun) a sum granted as reimbursement for expenses | - |
| (noun) a reserve fund created by a charge against profits in order to provide for changes in the value of a company's assets | Synonyms: allowance account, valuation account, valuation reserve |
| alloy | (noun) the state of impairing the quality or reducing the value of something | Synonyms: admixture |
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| (noun) a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten | Synonyms: metal |
| armadillo | (noun) burrowing chiefly nocturnal mammal with body covered with strong horny plates | - |
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| aspergillosis | (noun) an opportunistic infection by a fungus of the genus Aspergillus; characterized by inflammation and lesions of the ear and other organs | - |
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| (noun) disease especially in agricultural workers caused by inhalation of Aspergillus spores causing lumps in skin and ears and respiratory organs | - |
| (noun) severe respiratory disease of birds that takes the form of an acute rapidly fatal pneumonia in young chickens and turkeys | Synonyms: brooder pneumonia |
| ballock | (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, bollock, egg, nut, orchis, testicle, testis |
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| balloon | (noun) large tough nonrigid bag filled with gas or heated air | - |
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| (noun) small thin inflatable rubber bag with narrow neck | - |
| balloonfish | (noun) similar to but smaller than porcupinefish | Synonyms: Diodon holocanthus |
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| ballooning | (noun) flying in a balloon | - |
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| balloonist | (noun) someone who flies a balloon | - |
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| ballot | (noun) a choice that is made by counting the number of people in favor of each alternative | Synonyms: balloting, vote, voting |
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| (noun) a document listing the alternatives that is used in voting | - |
| balloting | (noun) a choice that is made by counting the number of people in favor of each alternative | Synonyms: ballot, vote, voting |
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| ballottement | (noun) a palpatory technique for feeling a floating object in the body (especially for determining the position of a fetus by feeling the rebound of the fetus after a quick digital tap on the wall of the uterus) | - |
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| bargello | (noun) needlepoint embroidery stitch that produces zigzag lines | Synonyms: flame stitch |
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| bedfellow | (noun) a person with whom you share a bed | Synonyms: bedmate |
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| (noun) a temporary associate | - |
| bellow | (noun) a very loud utterance (like the sound of an animal) | Synonyms: bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl |
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| bellower | (noun) someone who communicates vocally in a very loud voice | Synonyms: bawler, roarer, screamer, screecher, shouter, yeller |
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| bellowing | (noun) a very loud utterance (like the sound of an animal) | Synonyms: bellow, holla, holler, hollering, hollo, holloa, roar, roaring, yowl |
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| bellows | (noun) (used in the plural) a mechanical device that blows a strong current of air; used to make a fire burn more fiercely or to sound a musical instrument | - |
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| billow | (noun) a large sea wave | Synonyms: surge |
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| blanquillo | (noun) important marine food fishes | Synonyms: tilefish |
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| bollock | (noun) a pulley-block at the head of a topmast | Synonyms: bullock block |
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| (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, ballock, egg, nut, orchis, testicle, testis |
| bordello | (noun) a building where prostitutes are available | Synonyms: bagnio, bawdyhouse, brothel, cathouse, house of ill repute, house of prostitution, sporting house, whorehouse |
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| bouillon | (noun) a clear seasoned broth | - |
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| brucellosis | (noun) an infectious disease of domestic animals often resulting in spontaneous abortion; transmittable to human beings | Synonyms: Bang's disease, contagious abortion |
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| (noun) infectious bacterial disease of human beings transmitted by contact with infected animals or infected meat or milk products; characterized by fever and headache | Synonyms: Gibraltar fever, Malta fever, Mediterranean fever, Rock fever, undulant fever |
| bullock | (noun) castrated bull | Synonyms: steer |
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| (noun) young bull | - |
| caimitillo | (noun) tropical American timber tree with dark hard heavy wood and small plumlike purple fruit | Synonyms: Chrysophyllum oliviforme, damson plum, satin leaf, satinleaf |
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| callosectomy | (noun) severing the corpus callosum so that communication between the cerebral hemispheres is interrupted (in cases of severe intractable epilepsy) | Synonyms: callosotomy |
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| callosity | (noun) devoid of passion or feeling; hardheartedness | Synonyms: callousness, hardness, insensibility, unfeelingness |
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| (noun) an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot) | Synonyms: callus |
| callosotomy | (noun) severing the corpus callosum so that communication between the cerebral hemispheres is interrupted (in cases of severe intractable epilepsy) | Synonyms: callosectomy |
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| callousness | (noun) devoid of passion or feeling; hardheartedness | Synonyms: callosity, hardness, insensibility, unfeelingness |
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| callowness | (noun) lacking and evidencing lack of experience of life | Synonyms: jejuneness, juvenility |
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| cannelloni | (noun) tubular pasta filled with meat or cheese | - |
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| carillon | (noun) playing a set of bells that are (usually) hung in a tower | Synonyms: bell ringing, carillon playing |
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| (noun) set of bells hung in a bell tower | - |
| carillonneur | (noun) a musician who plays a carillon | - |
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| cello | (noun) a large stringed instrument; seated player holds it upright while playing | Synonyms: violoncello |
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| cellophane | (noun) a transparent paperlike product that is impervious to moisture and used to wrap candy or cigarettes etc. | - |
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| chancellor | (noun) the person who is head of government (in several countries) | Synonyms: premier, prime minister |
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| (noun) the honorary or titular head of a university | - |
| chancellorship | (noun) the office of chancellor | - |
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| chinchillon | (noun) gregarious burrowing rodent larger than the chinchillas | Synonyms: Lagostomus maximus, viscacha |
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| cigarillo | (noun) small cigar or cigarette wrapped in tobacco instead of paper | - |
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| codswallop | (noun) nonsensical talk or writing | Synonyms: applesauce, folderol, rubbish, trash, tripe, trumpery, wish-wash |
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| collocation | (noun) the act of positioning close together (or side by side) | Synonyms: apposition, juxtaposition |
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| (noun) a grouping of words in a sentence | - |
| collodion | (noun) a colorless syrupy solution of pyroxylin in ether and alcohol; used as a coating for wounds or photographic films | - |
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| colloid | (noun) a mixture with properties between those of a solution and fine suspension | - |
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| colloquialism | (noun) a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech | - |
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| colloquium | (noun) an address to an academic meeting or seminar | - |
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| (noun) an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting | - |
| colloquy | (noun) formal conversation | - |
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| (noun) a conversation especially a formal one | - |
| collotype | (noun) a photomechanical printing process that uses a glass plate with a gelatin surface that carries the image to be reproduced; can be used with one or more colors | Synonyms: collotype printing, photogelatin process |
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| coloradillo | (noun) handsome shrub with showy orange to scarlet or crimson flowers; Florida and West Indies to Mexico and Brazil | Synonyms: Hamelia erecta, Hamelia patens, scarlet bush, scarlet hamelia |
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| councillor | (noun) a member of a council | Synonyms: council member |
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| councillorship | (noun) the position of council member | Synonyms: councilorship |
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| counsellor | (noun) a lawyer who pleads cases in court | Synonyms: advocate, counsel, counselor-at-law, counselor, pleader |
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| (noun) someone who gives advice about problems | Synonyms: counselor |
| (noun) someone who has supervisory duties at a summer camp | Synonyms: counselor |
| counsellorship | (noun) the position of counselor | Synonyms: counselorship |
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| criollo | (noun) cocoa of superior quality | - |
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| (noun) a Spanish American of pure European stock (usually Spanish) | - |
| crystallogen | (noun) any chemical element that belongs to the carbon group. | Synonyms: carbon group element, Group 14 element, tetragen, tetrel |
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| crystallographer | (noun) a specialist in crystallography | - |
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| crystallography | (noun) the branch of science that studies the formation and structure of crystals | - |
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| dollop | (noun) a small measure (usually of food) | - |
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| escallop | (noun) edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions | Synonyms: scallop, scollop |
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| (noun) edible muscle of mollusks having fan-shaped shells; served broiled or poached or in salads or cream sauces | Synonyms: scallop, scollop |
| (noun) thin slice of meat (especially veal) usually fried or broiled | Synonyms: cutlet, scallop, scollop |
| falloff | (noun) a noticeable deterioration in performance or quality | Synonyms: drop-off, falling off, slack, slump |
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| fallout | (noun) any adverse and unwanted secondary effect | Synonyms: side effect |
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| (noun) the radioactive particles that settle to the ground after a nuclear explosion | Synonyms: radioactive dust |
| fallow | (noun) cultivated land that is not seeded for one or more growing seasons | - |
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| felloe | (noun) rim (or part of the rim) into which spokes are inserted | Synonyms: felly |
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| fellow | (noun) a boy or man | Synonyms: blighter, bloke, chap, cuss, fella, feller, gent, lad |
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| (noun) a man who is the lover of a man or woman | Synonyms: beau, boyfriend, swain |
| (noun) a friend who is frequently in the company of another | Synonyms: associate, companion, comrade, familiar |
| (noun) a person who is member of one's class or profession | Synonyms: colleague, confrere |
| (noun) an informal form of address for a man | Synonyms: buster, dude |
| (noun) a member of a learned society | - |
| (noun) one of a pair | Synonyms: mate |
| fellowship | (noun) an association of people who share common beliefs or activities | Synonyms: family |
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| (noun) money granted (by a university or foundation or other agency) for advanced study or research | - |
| (noun) the state of being with someone | Synonyms: companionship, company, society |
| follower | (noun) a person who accepts the leadership of another | - |
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| (noun) someone who travels behind or pursues another | - |
| followers | (noun) a group of followers or enthusiasts | Synonyms: following |
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| following | (noun) the act of pursuing in an effort to overtake or capture | Synonyms: chase, pursual, pursuit |
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| (noun) a group of followers or enthusiasts | Synonyms: followers |
| followup | (noun) a subsequent examination of a patient for the purpose of monitoring earlier treatment | Synonyms: follow-up, reexamination, review |
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| (noun) an activity that continues something that has already begun or that repeats something that has already been done | Synonyms: follow-up |
| (noun) a piece of work that exploits or builds on earlier work | Synonyms: follow-up |
| frijolillo | (noun) shrub or small tree having pinnate leaves poisonous to livestock and dense racemes of intensely fragrant blue flowers and red beans | Synonyms: coral bean, frijolito, mescal bean, Sophora secundiflora |
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| gallon | (noun) United States liquid unit equal to 4 quarts or 3.785 liters | Synonyms: gal |
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| (noun) a British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters | Synonyms: congius, Imperial gallon |
| gallop | (noun) a fast gait of a horse; a two-beat stride during which all four legs are off the ground simultaneously | - |
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| gallous | (noun) alternative terms for gallows | Synonyms: gallows-tree, gallows tree, gibbet |
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| gallows | (noun) an instrument of execution consisting of a wooden frame from which a condemned person is executed by hanging | - |
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| granadillo | (noun) West Indian tree yielding a fine grade of green ebony | Synonyms: Brya ebenus, granadilla tree |
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| guilloche | (noun) an architectural decoration formed by two intersecting wavy bands | - |
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| guillotine | (noun) instrument of execution that consists of a weighted blade between two vertical poles; used for beheading people | - |
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| (noun) closure imposed on the debate of specific sections of a bill | Synonyms: closure by compartment |
| halloo | (noun) a shout to attract attention | - |
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| hello | (noun) an expression of greeting | Synonyms: hi, how-do-you-do, howdy, hullo |
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| hillock | (noun) a small natural hill | Synonyms: hammock, hummock, knoll, mound |
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