| calcicolous | (adjective) growing or living in soil rich in lime | - |
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| calciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: cholecalciferol, D, ergocalciferol, viosterol, vitamin D |
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| calciferous | (adjective) bearing or producing or containing calcium or calcium carbonate or calcite | - |
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| calcific | (adjective) involving or resulting from calcification | - |
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| calcification | (noun) a process that impregnates something with calcium (or calcium salts) | - |
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| (noun) tissue hardened by deposition of lime salts | - |
| (noun) an inflexible and unchanging state | - |
| calcifugous | (adjective) growing or living in acid soil | - |
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| calcify | (verb) turn into lime; become calcified | - |
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| (verb) convert into lime | - |
| (verb) become impregnated with calcium salts | - |
| (verb) become inflexible and unchanging | - |
| calcimine | (noun) a water-base paint containing zinc oxide and glue and coloring; used as a wash for walls and ceilings | - |
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| (verb) cover with calcimine | - |
| calcination | (noun) the conversion of metals into their oxides as a result of heating to a high temperature | - |
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| calcine | (verb) heat a substance so that it oxidizes or reduces | - |
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| calcite | (noun) a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone | - |
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| calcitic | (adjective) of or relating to or containing calcite | - |
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| calcitonin | (noun) thyroid hormone that tends to lower the level of calcium in the blood plasma and inhibit resorption of bone | Synonyms: thyrocalcitonin |
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| calcium | (noun) a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals | Synonyms: atomic number 20, Ca |
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| calefacient | (adjective) producing the sensation of heat when applied to the body | Synonyms: warming |
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| calorifacient | (adjective) producing heat; usually used of foods | - |
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| calycinal | (adjective) of or relating to or resembling a calyx | Synonyms: calyceal, calycine |
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| calycine | (adjective) of or relating to or resembling a calyx | Synonyms: calyceal, calycinal |
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| capacious | (adjective) large in capacity | - |
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| capaciousness | (noun) spatial largeness and extensiveness (especially inside a building) | Synonyms: commodiousness, roominess, spaciousness |
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| (noun) intellectual breadth | Synonyms: roominess |
| capacitance | (noun) an electrical device characterized by its capacity to store an electric charge | Synonyms: capacitor, condenser, electrical condenser |
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| (noun) an electrical phenomenon whereby an electric charge is stored | Synonyms: capacity, electrical capacity |
| capacitate | (verb) make capable | - |
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| (verb) cause (spermatozoa) to undergo the physical changes necessary to fertilize an egg | - |
| (verb) make legally capable or qualify in law | - |
| capacitive | (adjective) of or relating to capacitance | - |
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| capacitor | (noun) an electrical device characterized by its capacity to store an electric charge | Synonyms: capacitance, condenser, electrical condenser |
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| capacity | (noun) the maximum production possible | - |
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| (noun) a specified function | - |
| (noun) capability to perform or produce | - |
| (noun) tolerance for alcohol | - |
| (noun) the power to learn or retain knowledge; in law, the ability to understand the facts and significance of your behavior | Synonyms: mental ability |
| (noun) an electrical phenomenon whereby an electric charge is stored | Synonyms: capacitance, electrical capacity |
| (noun) the amount that can be contained | Synonyms: content |
| (noun) (computer science) the amount of information (in bytes) that can be stored on a disk drive | - |
| (noun) the susceptibility of something to a particular treatment | Synonyms: capability |
| cappuccino | (noun) equal parts of espresso and hot milk topped with cinnamon and nutmeg and usually whipped cream | Synonyms: cappuccino coffee, coffee cappuccino |
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| capriccio | (noun) an instrumental composition that doesn't adhere to rules for any specific musical form and is played with improvisation | - |
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| capricious | (adjective) determined by chance or impulse or whim rather than by necessity or reason | Synonyms: impulsive, whimsical |
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| (adjective) changeable | Synonyms: freakish |
| capriciously | (adverb) in a capricious manner | - |
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| (adverb) unpredictably | Synonyms: freakishly |
| capriciousness | (noun) the trait of acting unpredictably and more from whim or caprice than from reason or judgment | Synonyms: arbitrariness, flightiness, whimsey, whimsicality, whimsy |
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| (noun) the quality of being guided by sudden unpredictable impulses | Synonyms: unpredictability |
| capsaicin | (noun) colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum such as chili and cayenne and jalapeno | - |
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| carbomycin | (noun) a colorless basic antibiotic that inhibits the growth of Gram-positive organisms | - |
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| carcinogen | (noun) any substance that produces cancer | - |
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| carcinogenic | (adjective) causing or tending to cause cancer | - |
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| carcinoid | (noun) a small tumor (benign or malignant) arising from the mucosa of the gastrointestinal tract; usually associated with excessive secretion of serotonin | - |
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| carcinoma | (noun) any malignant tumor derived from epithelial tissue; one of the four major types of cancer | - |
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| carcinomatous | (adjective) being or relating to carcinoma | - |
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| carcinosarcoma | (noun) a malignant neoplasm composed of carcinoma and sarcoma extensively intermixed | - |
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| catholicise | (verb) cause to adopt Catholicism | Synonyms: catholicize, latinise, latinize |
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| catholicity | (noun) the quality of being universal; existing everywhere | Synonyms: universality |
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| catholicize | (verb) cause to adopt Catholicism | Synonyms: catholicise, latinise, latinize |
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| cecity | (noun) the state of being blind or lacking sight | Synonyms: blindness, sightlessness |
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| cephaloglycin | (noun) antibiotic related to cephalosporin but no longer in common use | Synonyms: Kafocin |
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| ceramicist | (noun) a craftsman who shapes pottery on a potter's wheel and bakes them in a kiln | Synonyms: ceramist, potter, thrower |
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| cervicitis | (noun) inflammation of the uterine cervix | - |
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| chalcid | (noun) any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects | Synonyms: chalcid fly, chalcid wasp, chalcidfly |
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| chalcidfly | (noun) any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects | Synonyms: chalcid, chalcid fly, chalcid wasp |
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| chalcocite | (noun) a heavy grey mineral that is an ore of copper | Synonyms: copper glance |
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| characid | (noun) any freshwater fish of the family Characinidae | Synonyms: characin, characin fish |
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| characin | (noun) any freshwater fish of the family Characinidae | Synonyms: characid, characin fish |
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| chiocciole | (noun) a type of pasta that is elbow-shaped. | - |
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| chlorambucil | (noun) an alkylating agent (trade name Leukeran) used to treat some kinds of cancer | Synonyms: Leukeran |
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| chlorofucin | (noun) the chlorophyll present in brown algae, diatoms, and flagellates | Synonyms: chlorophyll c |
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| cholecalciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: calciferol, D, ergocalciferol, viosterol, vitamin D |
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| chromaticity | (noun) the quality of a color as determined by its dominant wavelength | Synonyms: hue |
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| ci | (adjective) being one more than one hundred | Synonyms: 101, hundred and one, one hundred one |
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| ciao | (noun) an acknowledgment that can be used to say hello or goodbye (aloha is Hawaiian and ciao is Italian) | Synonyms: aloha |
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| cicada | (noun) stout-bodied insect with large membranous wings; male has drum-like organs for producing a high-pitched drone | Synonyms: cicala |
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| cicala | (noun) stout-bodied insect with large membranous wings; male has drum-like organs for producing a high-pitched drone | Synonyms: cicada |
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| cicatrice | (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrix, scar |
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| cicatrise | (verb) form a scar, after an injury | Synonyms: cicatrize |
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| cicatrix | (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrice, scar |
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| cicatrize | (verb) form a scar, after an injury | Synonyms: cicatrise |
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| cicero | (noun) a linear unit of the size of type slightly larger than an em | - |
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| cicerone | (noun) a guide who conducts and informs sightseers | - |
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| cichlid | (noun) freshwater fishes of tropical America and Africa and Asia similar to American sunfishes; some are food fishes; many small ones are popular in aquariums | Synonyms: cichlid fish |
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| cider | (noun) a beverage made from juice pressed from apples | Synonyms: cyder |
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| ciderpress | (noun) a press that is used to extract the juice from apples | - |
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| cigar | (noun) a roll of tobacco for smoking | - |
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| cigaret | (noun) finely ground tobacco wrapped in paper; for smoking | Synonyms: butt, cigarette, coffin nail, fag |
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| cigarette | (noun) finely ground tobacco wrapped in paper; for smoking | Synonyms: butt, cigaret, coffin nail, fag |
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| cigarfish | (noun) small fusiform fish of western Atlantic | Synonyms: Decapterus punctatus, quiaquia, round scad |
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| cigarillo | (noun) small cigar or cigarette wrapped in tobacco instead of paper | - |
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| cilantro | (noun) parsley-like herb used as seasoning or garnish | Synonyms: Chinese parsley, coriander |
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| (noun) Old World herb with aromatic leaves and seed resembling parsley | Synonyms: Chinese parsley, coriander, coriander plant, Coriandrum sativum |
| cilial | (adjective) of or relating to cilia projecting from the surface of a cell | Synonyms: ciliary, ciliate |
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| ciliary | (adjective) relating to the ciliary body and associated structures of the eye | - |
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| (adjective) of or relating to cilia projecting from the surface of a cell | Synonyms: cilial, ciliate |
| (adjective) of or relating to the human eyelash | Synonyms: ciliate |
| ciliate | (adjective) of or relating to the human eyelash | Synonyms: ciliary |
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| (adjective) of or relating to cilia projecting from the surface of a cell | Synonyms: cilial, ciliary |
| (adjective) having a margin or fringe of hairlike projections | Synonyms: ciliated |
| (noun) a protozoan with a microscopic appendage extending from the surface of the cell | Synonyms: ciliated protozoan, ciliophoran |
| ciliated | (adjective) having a margin or fringe of hairlike projections | Synonyms: ciliate |
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| ciliophoran | (noun) a protozoan with a microscopic appendage extending from the surface of the cell | Synonyms: ciliate, ciliated protozoan |
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| cilium | (noun) a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms | - |
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| (noun) any of the short curved hairs that grow from the edges of the eyelids | Synonyms: eyelash, lash |
| cimarron | (noun) wild sheep of mountainous regions of western North America having massive curled horns | Synonyms: bighorn, bighorn sheep, Ovis canadensis, Rocky Mountain bighorn, Rocky Mountain sheep |
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| cimetidine | (noun) a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid | Synonyms: Tagamet |
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| cinch | (noun) a form of all fours in which the players bid for the privilege of naming trumps | - |
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| (noun) any undertaking that is easy to do | Synonyms: breeze, child's play, duck soup, picnic, piece of cake, pushover, snap, walkover |
| (noun) stable gear consisting of a band around a horse's belly that holds the saddle in place | Synonyms: girth |
| (verb) get a grip on; get mastery of | - |
| (verb) make sure of | - |
| (verb) tie a cinch around | Synonyms: girth |
| cinchona | (noun) any of several trees of the genus Cinchona | Synonyms: chinchona |
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| (noun) medicinal bark of cinchona trees; source of quinine and quinidine | Synonyms: cinchona bark, Jesuit's bark, Peruvian bark |
| cinchonine | (noun) an alkaloid derivative of the bark of cinchona trees that is used as an antimalarial drug | - |
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| cincture | (noun) a band of material around the waist that strengthens a skirt or trousers | Synonyms: girdle, sash, waistband, waistcloth |
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| cinder | (noun) a fragment of incombustible matter left after a wood or coal or charcoal fire | Synonyms: clinker |
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| cinema | (noun) a theater where films are shown | Synonyms: movie house, movie theater, movie theatre, picture palace |
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| (noun) a medium that disseminates moving pictures | Synonyms: celluloid, film |
| cinematic | (adjective) of or pertaining to or characteristic of the cinema | - |
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| cinematise | (verb) make a film of or adopt so as to make into a film | Synonyms: cinematize |
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| cinematize | (verb) make a film of or adopt so as to make into a film | Synonyms: cinematise |
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| cinematographer | (noun) a photographer who operates a movie camera | Synonyms: camera operator, cameraman |
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| cinematography | (noun) the act of making a film | Synonyms: filming, motion-picture photography |
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| cineraria | (noun) herb of Canary Islands widely cultivated for its blue or purple or red or variegated daisylike flowers | Synonyms: Pericallis cruenta, Senecio cruentus |
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| cinerarium | (noun) a niche for a funeral urn containing the ashes of the cremated dead | Synonyms: columbarium |
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| cinerary | (adjective) containing or used for ashes of the cremated dead | - |
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| cingulum | (noun) (anatomy) an encircling structure (as the ridge around the base of a tooth) | - |
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| cinnabar | (adjective) of a vivid red to reddish-orange color | Synonyms: Chinese-red, vermilion, vermillion |
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| (noun) large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwort | Synonyms: Callimorpha jacobeae, cinnabar moth |
| (noun) a heavy reddish mineral consisting of mercuric sulfide; the chief source of mercury | - |
| cinnamene | (noun) a colorless oily liquid; the monomer for polystyrene | Synonyms: phenylethylene, styrene, vinylbenzene |
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| cinnamon | (noun) spice from the dried aromatic bark of the Ceylon cinnamon tree; used as rolled strips or ground | - |
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| (noun) tropical Asian tree with aromatic yellowish-brown bark; source of the spice cinnamon | Synonyms: Ceylon cinnamon, Ceylon cinnamon tree, Cinnamomum zeylanicum |
| (noun) aromatic bark used as a spice | Synonyms: cinnamon bark |