| acaracide | (noun) a chemical agent used to kill mites | Synonyms: acaricide |
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| acardia | (noun) congenital absence of the heart (as in the development of some monsters) | - |
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| acariasis | (noun) infestation with itch mites | Synonyms: acaridiasis, acariosis |
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| acaricide | (noun) a chemical agent used to kill mites | Synonyms: acaracide |
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| acarid | (noun) very small free-living arachnid that is parasitic on animals or plants; related to ticks | - |
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| acaridiasis | (noun) infestation with itch mites | Synonyms: acariasis, acariosis |
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| acarine | (noun) mite or tick | - |
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| acariosis | (noun) infestation with itch mites | Synonyms: acariasis, acaridiasis |
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| acarophobia | (noun) a morbid fear of small insects and mites and worms | - |
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| acarus | (noun) any of several mites of the order Acarina | Synonyms: genus Acarus |
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| acaryote | (noun) a cell without a nucleus (as an erythrocyte) | Synonyms: akaryocyte, akaryote |
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| acrocarp | (noun) a moss in which the main axis is terminated by the archegonium (and hence the capsule) | Synonyms: acrocarpous moss |
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| adenocarcinoma | (noun) malignant tumor originating in glandular epithelium | Synonyms: glandular cancer, glandular carcinoma |
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| aftercare | (noun) care and treatment of a convalescent patient | - |
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| angiocardiogram | (noun) a series of X rays representing the action of the heart and its blood vessels after the injection of a radiopaque substance | - |
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| angiocarp | (noun) tree bearing fruit enclosed in a shell or involucre or husk | - |
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| apothecary | (noun) a health professional trained in the art of preparing and dispensing drugs | Synonyms: chemist, druggist, pharmacist, pill pusher, pill roller |
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| applecart | (noun) a handcart from which apples and other fruit are sold in the street | - |
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| (noun) the planning that is disrupted when someone `upsets the applecart' | - |
| araucaria | (noun) any of several tall South American or Australian trees with large cones and edible seeds | - |
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| ascariasis | (noun) infestation of the human intestine with Ascaris roundworms | - |
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| ascocarp | (noun) mature fruiting body of an ascomycetous fungus | - |
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| baccarat | (noun) a card game played in casinos in which two or more punters gamble against the banker; the player wins who holds 2 or 3 cards that total closest to nine | Synonyms: chemin de fer |
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| ballistocardiogram | (noun) a graphical recording made by a ballistocardiograph | - |
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| ballistocardiograph | (noun) a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles | Synonyms: cardiograph |
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| barcarole | (noun) a boating song sung by Venetian gondoliers | Synonyms: barcarolle |
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| barcarolle | (noun) a boating song sung by Venetian gondoliers | Synonyms: barcarole |
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| basidiocarp | (noun) the fruiting body of a basidiomycete which bears its spores on special cells | - |
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| bicarbonate | (noun) a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate | Synonyms: hydrogen carbonate |
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| boxcar | (noun) a freight car with roof and sliding doors in the sides | - |
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| boxcars | (noun) (usually plural) an expression used when two dice are thrown and both come up showing six spots | - |
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| bradycardia | (noun) abnormally slow heartbeat | - |
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| car | (noun) a motor vehicle with four wheels; usually propelled by an internal combustion engine | Synonyms: auto, automobile, machine, motorcar |
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| (noun) a wheeled vehicle adapted to the rails of railroad | Synonyms: railcar, railroad car, railway car |
| (noun) where passengers ride up and down | Synonyms: elevator car |
| (noun) the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant | Synonyms: gondola |
| (noun) a conveyance for passengers or freight on a cable railway | Synonyms: cable car |
| carabao | (noun) water buffalo of the Philippines | - |
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| carabineer | (noun) a soldier (historically a mounted soldier) who is armed with a carbine | Synonyms: carabinier, carbineer |
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| carabiner | (noun) an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes | Synonyms: karabiner, snap ring |
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| carabinier | (noun) a soldier (historically a mounted soldier) who is armed with a carbine | Synonyms: carabineer, carbineer |
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| caracal | (noun) of deserts of northern Africa and southern Asia | Synonyms: desert lynx, Lynx caracal |
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| caracara | (noun) any of various long-legged carrion-eating hawks of South America and Central America | - |
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| carack | (noun) a large galleon sailed in the Mediterranean as a merchantman | Synonyms: carrack |
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| caracolito | (noun) large Costa Rican tree having light-colored wood suitable for cabinetry; similar to the African lepidobotrys in wood structure as well as in fruit and flowers and leaves and seeds; often classified in other families | Synonyms: Ruptiliocarpon caracolito |
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| caracul | (noun) hardy coarse-haired sheep of central Asia; lambs are valued for their soft curly black fur | Synonyms: broadtail, karakul |
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| carafe | (noun) a bottle with a stopper; for serving wine or water | Synonyms: decanter |
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| caragana | (noun) any plant of the genus Caragana having even-pinnate leaves and mostly yellow flowers followed by seeds in a linear pod | Synonyms: pea tree |
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| carageen | (noun) dark purple edible seaweed of the Atlantic coasts of Europe and North America | Synonyms: carrageen, carragheen, Chondrus crispus, Irish moss |
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| carambola | (noun) deeply ridged yellow-brown tropical fruit; used raw as a vegetable or in salad or when fully ripe as a dessert | Synonyms: star fruit |
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| (noun) East Indian tree bearing deeply ridged yellow-brown fruit | Synonyms: Averrhoa carambola, carambola tree |
| caramel | (noun) a medium to dark tan color | Synonyms: buff, caramel brown, raw sienna, yellowish brown |
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| (noun) firm chewy candy made from caramelized sugar and butter and milk | - |
| (noun) burnt sugar; used to color and flavor food | Synonyms: caramelized sugar |
| carancha | (noun) South American caracara | Synonyms: Polyborus plancus |
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| caranda | (noun) South American palm yielding a wax similar to carnauba wax | Synonyms: caranda palm, caranday, Copernicia alba, Copernicia australis, wax palm |
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| caranday | (noun) South American palm yielding a wax similar to carnauba wax | Synonyms: caranda, caranda palm, Copernicia alba, Copernicia australis, wax palm |
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| carangid | (noun) a percoid fish of the family Carangidae | Synonyms: carangid fish |
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| carapace | (noun) hard outer covering or case of certain organisms such as arthropods and turtles | Synonyms: cuticle, shell, shield |
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| carat | (noun) a unit of weight for precious stones = 200 mg | - |
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| (noun) the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold | Synonyms: karat, kt |
| caravan | (noun) a camper equipped with living quarters | Synonyms: van |
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| (noun) a procession (of wagons or mules or camels) traveling together in single file | Synonyms: train, wagon train |
| caravanning | (noun) the practice of taking holidays in a caravan | - |
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| caravansary | (noun) an inn in some eastern countries with a large courtyard that provides accommodation for caravans | Synonyms: caravan inn, caravanserai, khan |
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| caravanserai | (noun) an inn in some eastern countries with a large courtyard that provides accommodation for caravans | Synonyms: caravan inn, caravansary, khan |
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| caraway | (noun) leaves used sparingly in soups and stews | - |
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| (noun) a Eurasian plant with small white flowers yielding caraway seed | Synonyms: Carum carvi |
| carbamate | (noun) a salt (or ester) of carbamic acid | - |
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| carbamide | (noun) the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics | Synonyms: urea |
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| carbide | (noun) a binary compound of carbon with a more electropositive element | - |
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| carbine | (noun) light automatic rifle | - |
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| carbineer | (noun) a soldier (historically a mounted soldier) who is armed with a carbine | Synonyms: carabineer, carabinier |
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| carbohydrate | (noun) an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Synonyms: saccharide, sugar |
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| carbomycin | (noun) a colorless basic antibiotic that inhibits the growth of Gram-positive organisms | - |
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| carbon | (noun) a copy made with carbon paper | Synonyms: carbon copy |
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| (noun) an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds | Synonyms: atomic number 6, C |
| (noun) a thin paper coated on one side with a dark waxy substance (often containing carbon); used to transfer characters from the original to an under sheet of paper | Synonyms: carbon paper |
| carbonado | (noun) a piece of meat (or fish) that has been scored and broiled | - |
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| (noun) an inferior dark diamond used in industry for drilling and polishing | Synonyms: black diamond |
| carbonara | (noun) sauce for pasta; contains eggs and bacon or ham and grated cheese | - |
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| carbonate | (noun) a salt or ester of carbonic acid (containing the anion CO3) | - |
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| carbonation | (noun) saturation with carbon dioxide (as soda water) | - |
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| carbonator | (noun) a device that carries out carbonation. | Synonyms: soda carbonator, soda maker |
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| carbonisation | (noun) the destructive distillation of coal (as in coke ovens) | Synonyms: carbonization |
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| carbonization | (noun) the destructive distillation of coal (as in coke ovens) | Synonyms: carbonisation |
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| carbonyl | (noun) a compound containing metal combined with carbon monoxide | - |
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| carborundum | (noun) an abrasive composed of silicon carbide crystals | - |
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| carboxyl | (noun) the univalent radical -COOH; present in and characteristic of organic acids | Synonyms: carboxyl group |
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| carboy | (noun) a large bottle for holding corrosive liquids; usually cushioned in a special container | - |
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| carbuncle | (noun) an infection larger than a boil and with several openings for discharge of pus | - |
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| (noun) deep-red cabochon garnet cut without facets | - |
| carburetor | (noun) mixes air with gasoline vapor prior to explosion | Synonyms: carburettor |
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| carburettor | (noun) mixes air with gasoline vapor prior to explosion | Synonyms: carburetor |
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| carcajou | (noun) stocky shaggy-coated North American carnivorous mammal | Synonyms: Gulo luscus, skunk bear, wolverine |
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| carcase | (noun) the dead body of an animal especially one slaughtered and dressed for food | Synonyms: carcass |
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| carcass | (noun) the dead body of an animal especially one slaughtered and dressed for food | Synonyms: carcase |
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| carcinogen | (noun) any substance that produces 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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| carcinosarcoma | (noun) a malignant neoplasm composed of carcinoma and sarcoma extensively intermixed | - |
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| card | (noun) one of a set of small pieces of stiff paper marked in various ways and used for playing games or for telling fortunes | - |
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| (noun) a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities | Synonyms: add-in, board, circuit board, circuit card, plug-in |
| (noun) a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures) | - |
| (noun) a card certifying the identity of the bearer | Synonyms: identity card |
| (noun) a sign posted in a public place as an advertisement | Synonyms: bill, notice, placard, poster, posting |
| (noun) (baseball) a list of batters in the order in which they will bat | Synonyms: batting order, lineup |
| (noun) a printed or written greeting that is left to indicate that you have visited | Synonyms: calling card, visiting card |
| (noun) a list of dishes available at a restaurant | Synonyms: bill of fare, carte, carte du jour, menu |
| (noun) (golf) a record of scores (as in golf) | Synonyms: scorecard |
| (noun) a witty amusing person who makes jokes | Synonyms: wag, wit |
| (noun) thin cardboard, usually rectangular | - |
| cardamom | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamon, cardamum |
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| (noun) rhizomatous herb of India having aromatic seeds used as seasoning | Synonyms: cardamon, Elettaria cardamomum |
| cardamon | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamom, cardamum |
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| (noun) rhizomatous herb of India having aromatic seeds used as seasoning | Synonyms: cardamom, Elettaria cardamomum |
| cardamum | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamom, cardamon |
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| cardboard | (noun) a stiff moderately thick paper | Synonyms: composition board |
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| cardcase | (noun) a small case for carrying business cards | - |
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| cardcastle | (noun) an unstable construction with playing cards | Synonyms: card-house, cardhouse, house of cards |
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| cardholder | (noun) a player who holds a card or cards in a card game | - |
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| (noun) a person who holds a credit card or debit card | - |
| cardhouse | (noun) an unstable construction with playing cards | Synonyms: card-house, cardcastle, house of cards |
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| cardia | (noun) the opening into the stomach and that part of the stomach connected to the esophagus | - |
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| cardigan | (noun) knitted jacket that is fastened up the front with buttons or a zipper | - |
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| cardinal | (noun) crested thick-billed North American finch having bright red plumage in the male | Synonyms: cardinal grosbeak, Cardinalis cardinalis, redbird, Richmondena Cardinalis |
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| (noun) a variable color averaging a vivid red | Synonyms: carmine |
| (noun) (Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes | - |
| (noun) the number of elements in a mathematical set; denotes a quantity but not the order | Synonyms: cardinal number |
| cardinalate | (noun) the office of cardinal | Synonyms: cardinalship |
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| (noun) (Roman Catholic Church) the body of all cardinals of the church; elects and advises the pope | Synonyms: College of Cardinals, Sacred College, Sacred College of Cardinals |
| cardinalfish | (noun) small red fishes of coral reefs and inshore tropical waters | - |
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