| chiropractor | (noun) a therapist who practices chiropractic | - |
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| chiropteran | (noun) nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate | Synonyms: bat |
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| chirp | (noun) a sharp sound made by small birds or insects | - |
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| chirpiness | (noun) cheerful and lively | - |
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| chirrup | (noun) a series of chirps | Synonyms: twitter |
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| chisel | (noun) an edge tool with a flat steel blade with a cutting edge | - |
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| chiseler | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseller, defrauder, gouger, grifter, scammer, swindler |
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| chiseller | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseler, defrauder, gouger, grifter, scammer, swindler |
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| chit | (noun) the bill in a restaurant | Synonyms: check, tab |
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| (noun) a dismissive term for a girl who is immature or who lacks respect | - |
| chitchat | (noun) light informal conversation for social occasions | Synonyms: causerie, chin-wag, chin-wagging, chin wag, chin wagging, chit-chat, chit chat, gab, gabfest, gossip, small talk, tittle-tattle |
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| chitin | (noun) a tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi | - |
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| chitlings | (noun) small intestines of hogs prepared as food | Synonyms: chitlins, chitterlings |
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| chitlins | (noun) small intestines of hogs prepared as food | Synonyms: chitlings, chitterlings |
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| chiton | (noun) primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates | Synonyms: coat-of-mail shell, polyplacophore, sea cradle |
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| (noun) a woolen tunic worn by men and women in ancient Greece | - |
| chittamwood | (noun) deciduous tree of southeastern United States and Mexico | Synonyms: black haw, Bumelia lanuginosa, chittimwood, false buckthorn, shittimwood |
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| (noun) shrubby tree of the Pacific coast of the United States; yields cascara sagrada | Synonyms: bearberry, bearwood, cascara buckthorn, chittimwood, Rhamnus purshianus |
| (noun) shrubby tree of southern United States having large plumes of feathery flowers resembling puffs of smoke | Synonyms: American smokewood, Cotinus americanus, Cotinus obovatus |
| chitterlings | (noun) small intestines of hogs prepared as food | Synonyms: chitlings, chitlins |
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| chittimwood | (noun) deciduous tree of southeastern United States and Mexico | Synonyms: black haw, Bumelia lanuginosa, chittamwood, false buckthorn, shittimwood |
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| (noun) shrubby tree of the Pacific coast of the United States; yields cascara sagrada | Synonyms: bearberry, bearwood, cascara buckthorn, chittamwood, Rhamnus purshianus |
| chivalry | (noun) courtesy towards women | Synonyms: gallantry, politesse |
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| (noun) the medieval principles governing knighthood and knightly conduct | Synonyms: knightliness |
| chivaree | (noun) a noisy mock serenade (made by banging pans and kettles) to a newly married couple | Synonyms: belling, callathump, callithump, charivari, shivaree |
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| chive | (noun) perennial having hollow cylindrical leaves used for seasoning | Synonyms: Allium schoenoprasum, chives, cive, schnittlaugh |
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| chives | (noun) cylindrical leaves used fresh as a mild onion-flavored seasoning | - |
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| (noun) perennial having hollow cylindrical leaves used for seasoning | Synonyms: Allium schoenoprasum, chive, cive, schnittlaugh |
| chlamydia | (noun) coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract | - |
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| (noun) a sexually transmitted infection caused by bacteria of the genus Chlamydia | - |
| chlamydospore | (noun) thick-walled asexual resting spore of certain fungi and algae | - |
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| chlamyphore | (noun) very small Argentine armadillo with pale silky hair and pink plates on head and neck | Synonyms: Chlamyphorus truncatus, fairy armadillo, pichiciago, pichiciego |
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| chlamys | (noun) a short mantle or cape fastened at the shoulder; worn by men in ancient Greece | - |
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| (noun) collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | Synonyms: floral envelope, perianth, perigone, perigonium |
| chloasma | (noun) a tan discoloration of a woman's face that is associated with pregnancy or with the use of oral contraceptives | Synonyms: mask of pregnancy, melasma |
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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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| chloramine | (noun) any of several compounds containing chlorine and nitrogen; used as an antiseptic in wounds | Synonyms: chloramine-T |
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| chloramphenicol | (noun) an oral antibiotic (trade name Chloromycetin) used to treat serious infections (especially typhoid fever) | Synonyms: Chloromycetin |
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| chlorate | (noun) any salt of chloric acid | - |
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| chlordiazepoxide | (noun) a tranquilizer (trade names Librium and Libritabs) used in the treatment of alcoholism | Synonyms: Libritabs, Librium |
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| chlorella | (noun) any alga of the genus Chlorella | - |
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| chlorenchyma | (noun) parenchyma whose cells contain chloroplasts | - |
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| chlorhexidine | (noun) a long-lasting liquid antiseptic; used by surgeons to wash their hands before performing surgery | - |
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| chloride | (noun) any compound containing a chlorine atom | - |
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| (noun) any salt of hydrochloric acid (containing the chloride ion) | - |
| chlorination | (noun) disinfection of water by the addition of small amounts of chlorine or a chlorine compound | - |
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| (noun) the addition or substitution of chlorine in organic compounds | - |
| chlorine | (noun) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) | Synonyms: atomic number 17, Cl |
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| chlorinity | (noun) a measure of the quantity of chlorine or other halides in water (especially seawater) | - |
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| chlorite | (noun) a generally green or black mineral; it occurs as a constituent of many rocks typically in the form of a flat crystal | - |
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| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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| chlorobenzene | (noun) a colorless volatile flammable liquid with an almond odor that is made from chlorine and benzene; used as a solvent and in the production of phenol and DDT and other organic compounds | - |
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| chlorobenzylidenemalononitrile | (noun) a tear gas that is stronger than CN gas but wears off faster; can be deployed by grenades or cluster bombs; can cause skin burns and fatal pulmonary edema | Synonyms: CS gas |
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| chlorofluorocarbon | (noun) a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans | Synonyms: CFC |
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| chloroform | (noun) a volatile liquid haloform (CHCl3); formerly used as an anesthetic | Synonyms: trichloromethane |
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| chlorofucin | (noun) the chlorophyll present in brown algae, diatoms, and flagellates | Synonyms: chlorophyll c |
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| chlorophyl | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyll |
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| chlorophyll | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyl |
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| chlorophyte | (noun) algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water | Synonyms: green algae |
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| chloropicrin | (noun) a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas | Synonyms: nitrochloroform |
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| chloroplast | (noun) plastid containing chlorophyll and other pigments; in plants that carry out photosynthesis | - |
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| chloroplatinate | (noun) any salt of chloroplatinic acid. | - |
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| chloroprene | (noun) derivative of butadiene used in making neoprene by polymerization | - |
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| chloroquine | (noun) an antimalarial drug used to treat malaria and amebic dysentery and systemic lupus erythematosus | - |
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| chlorosis | (noun) iron deficiency anemia in young women; characterized by weakness and menstrual disturbances and a green color to the skin | Synonyms: greensickness |
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| chlorothiazide | (noun) a diuretic drug (trade name Diuril) used in the treatment of edema and hypertension | Synonyms: Diuril |
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| chlorpromazine | (noun) a drug (trade name Thorazine) derived from phenothiazine that has antipsychotic effects and is used as a sedative and tranquilizer | Synonyms: Thorazine |
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| chlorpyrifos | (noun) a common organophosphate insecticide | - |
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| chlortetracycline | (noun) a yellow crystalline antibiotic (trade name Aureomycin) used to treat certain bacterial and rickettsial diseases | Synonyms: Aureomycin |
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| chlorthalidone | (noun) a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks | Synonyms: Hygroton, Thalidone |
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| choana | (noun) either one of the two posterior openings at the back of the nasal cavity leading to the nasopharynx | Synonyms: internal nostril, posterior nasal aperture |
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| choanocyte | (noun) any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body | Synonyms: collar cell |
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| choc | (noun) colloquial British abbreviation | - |
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| chock | (noun) a block of wood used to prevent the sliding or rolling of a heavy object | Synonyms: wedge |
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| chocolate | (noun) a medium brown to dark-brown color | Synonyms: burnt umber, coffee, deep brown, umber |
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| (noun) a food made from roasted ground cacao beans | - |
| (noun) a beverage made from cocoa powder and milk and sugar; usually drunk hot | Synonyms: cocoa, drinking chocolate, hot chocolate |
| choice | (noun) the act of choosing or selecting | Synonyms: option, pick, selection |
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| (noun) the person or thing chosen or selected | Synonyms: pick, selection |
| (noun) one of a number of things from which only one can be chosen | Synonyms: alternative, option |
| choiceness | (noun) the quality of being very good indeed | Synonyms: fineness |
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| choir | (noun) the area occupied by singers; the part of the chancel between sanctuary and nave | - |
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| (noun) a chorus that sings as part of a religious ceremony | - |
| (noun) a family of similar musical instrument playing together | Synonyms: consort |
| choirboy | (noun) a boy who sings in a choir | - |
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| choirmaster | (noun) the musical director of a choir | Synonyms: cantor, precentor |
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| choke | (noun) a valve that controls the flow of air into the carburetor of a gasoline engine | - |
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| (noun) a coil of low resistance and high inductance used in electrical circuits to pass direct current and attenuate alternating current | Synonyms: choke coil, choking coil |
| chokecherry | (noun) a common wild cherry of eastern North America having small bitter black berries favored by birds | Synonyms: chokecherry tree, Prunus virginiana |
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| (noun) the fruit of the chokecherry tree | - |
| chokedamp | (noun) the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life | Synonyms: blackdamp |
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| chokehold | (noun) a restraining hold; someone loops the arm around the neck of another person in a tight grip, usually from behind | Synonyms: choke hold |
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| (noun) complete power over a person or situation | Synonyms: stranglehold, throttlehold |
| chokepoint | (noun) a point of congestion or blockage | - |
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| (noun) a narrowing that reduces the flow through a channel | Synonyms: bottleneck, constriction |
| choker | (noun) a high tight collar | Synonyms: neck ruff, ruff, ruffle |
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| (noun) necklace that fits tightly around a woman's neck | Synonyms: collar, dog collar, neckband |
| (noun) someone who kills by strangling | Synonyms: garroter, garrotter, strangler, throttler |
| (noun) an unfortunate person who is unable to perform effectively because of nervous tension or agitation | - |
| chokey | (noun) British slang (dated) for a prison | Synonyms: choky |
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| choking | (noun) the act of suffocating (someone) by constricting the windpipe | Synonyms: strangling, strangulation, throttling |
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| (noun) a condition caused by blocking the airways to the lungs (as with food or swelling of the larynx) | - |
| choky | (noun) British slang (dated) for a prison | Synonyms: chokey |
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| cholangiography | (noun) roentgenographic examination of the bile ducts after a contrast medium has been injected | - |
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| cholangitis | (noun) inflammation of the bile ducts | - |
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| cholecalciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: calciferol, D, ergocalciferol, viosterol, vitamin D |
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| cholecystectomy | (noun) surgical removal of the gall bladder (usually for relief of gallstone pain) | - |
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| cholecystitis | (noun) inflammation of the gall bladder | - |
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| cholecystokinin | (noun) a gastrointestinal hormone that stimulates the secretion of pancreatic enzymes and the contraction and emptying of the gall bladder; its release is stimulated by the presence of fatty acids and amino acids in the small intestine | - |
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| cholelithiasis | (noun) the presence of gallstones in the gallbladder | - |
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| cholelithotomy | (noun) removal of gallstone through an incision in the gallbladder | - |
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| choler | (noun) a humor that was once believed to be secreted by the liver and to cause irritability and anger | Synonyms: yellow bile |
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| (noun) a strong emotion; a feeling that is oriented toward some real or supposed grievance | Synonyms: anger, ire |
| (noun) an irritable petulant feeling | Synonyms: crossness, fretfulness, fussiness, irritability, peevishness, petulance |
| cholera | (noun) an acute intestinal infection caused by ingestion of contaminated water or food | Synonyms: Asiatic cholera, epidemic cholera, Indian cholera |
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| cholestasis | (noun) a condition in which little or no bile is secreted or the flow of bile into the digestive tract is obstructed | Synonyms: acholia |
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| cholesterin | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterol |
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| cholesterol | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterin |
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| choline | (noun) a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fat | - |
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| cholinesterase | (noun) an enzyme that hydrolyses acetylcholine (into choline and acetic acid) | - |
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| cholla | (noun) arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico | Synonyms: Opuntia cholla |
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| chomp | (noun) the act of gripping or chewing off with the teeth and jaws | Synonyms: bite |
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| chomping | (noun) the act of chewing noisily | - |
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| chon | (noun) 100 chon equal 1 won in North Korea | - |
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| (noun) 100 chon equal 1 won in South Korea | - |
| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| chondrin | (noun) a substance that resembles gelatin and is obtained by boiling cartilage in water | - |
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| chondriosome | (noun) an organelle containing enzymes responsible for producing energy | Synonyms: mitochondrion |
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