| chlorotic | (adjective) of or pertaining to or suffering from chlorosis | Synonyms: greensick |
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| cholelithotomy | (noun) removal of gallstone through an incision in the gallbladder | - |
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| chrysotherapy | (noun) the use of chemicals containing gold for treating diseases (such as rheumatoid arthritis) | - |
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| chrysotile | (noun) a grey or green fibrous mineral; an important source of commercial asbestos | - |
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| clawfoot | (noun) a deformity of the foot characterized by an abnormally high arch and hyperextension of the toes which gives the foot the appearance of a claw | Synonyms: pes cavus |
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| cleistothecium | (noun) closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration | Synonyms: cleistocarp |
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| clot | (noun) a lump of material formed from the content of a liquid | Synonyms: coagulum |
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| (verb) turn into curds | Synonyms: clabber, curdle |
| (verb) change from a liquid to a thickened or solid state | Synonyms: coagulate |
| (verb) cause to change from a liquid to a solid or thickened state | Synonyms: coagulate |
| (verb) coalesce or unite in a mass | Synonyms: clog |
| clotbur | (noun) any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs | Synonyms: burdock |
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| cloth | (noun) artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers | Synonyms: fabric, material, textile |
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| clothe | (verb) provide with clothes or put clothes on | Synonyms: apparel, dress, enclothe, fit out, garb, garment, habilitate, raiment, tog |
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| (verb) cover as if with clothing | Synonyms: cloak, drape, robe |
| (verb) furnish with power or authority; of kings or emperors | Synonyms: adorn, invest |
| clothed | (adjective) wearing or provided with clothing; sometimes used in combination | Synonyms: clad |
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| (adjective) covered with or as if with clothes or a wrap or cloak | Synonyms: cloaked, draped, mantled, wrapped |
| clothes | (noun) clothing in general | Synonyms: apparel, dress, wearing apparel |
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| clothesbrush | (noun) a brush used for cleaning clothing | - |
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| clotheshorse | (noun) a framework on which to hang clothes (as for drying) | - |
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| (noun) a man who is much concerned with his dress and appearance | Synonyms: beau, dandy, dude, fashion plate, fop, gallant, sheik, swell |
| clothesless | (adjective) possessing no clothing | Synonyms: garmentless, raimentless |
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| clothesline | (noun) a cord on which clothes are hung to dry | - |
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| clothespin | (noun) wood or plastic fastener; for holding clothes on a clothesline | Synonyms: clothes peg, clothes pin |
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| clothespress | (noun) a closet where clothes are stored | Synonyms: clothes closet |
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| clothier | (noun) a merchant who sells men's clothing | Synonyms: haberdasher |
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| clothing | (noun) a covering designed to be worn on a person's body | Synonyms: article of clothing, habiliment, vesture, wear, wearable |
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| clotted | (adjective) thickened or coalesced in soft thick lumps (such as clogs or clots) | Synonyms: clogged |
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| clotting | (noun) the process of forming semisolid lumps in a liquid | Synonyms: coagulation, curdling |
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| cloture | (noun) a rule for limiting or ending debate in a deliberative body | Synonyms: closure, gag law, gag rule |
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| (verb) terminate debate by calling for a vote | Synonyms: closure |
| cloveroot | (noun) hairy Eurasian plant with small yellow flowers and an astringent root formerly used medicinally | Synonyms: clover-root, Geum urbanum, herb bennet, wood avens |
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| clubfoot | (noun) congenital deformity of the foot usually marked by a curled shape or twisted position of the ankle and heel and toes | Synonyms: talipes |
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| clubfooted | (adjective) having a deformed foot | Synonyms: taliped |
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| cocksfoot | (noun) widely grown stout Old World hay and pasture grass | Synonyms: cockspur, Dactylis glomerata, orchard grass |
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| cocotte | (noun) a small casserole in which individual portions can be cooked and served | - |
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| (noun) a woman who engages in sexual intercourse for money | Synonyms: bawd, cyprian, fancy woman, harlot, lady of pleasure, prostitute, sporting lady, tart, whore, woman of the street, working girl |
| coffeepot | (noun) tall pot in which coffee is brewed | - |
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| colicroot | (noun) any of several perennials of the genus Aletris having grasslike leaves and bitter roots reputed to cure colic | Synonyms: colic root, crow corn, star grass, unicorn root |
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| 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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| coltsfoot | (noun) perennial herb with large rounded leaves resembling a colt's foot and yellow flowers appearing before the leaves do; native to Europe but now nearly cosmopolitan; used medicinally especially formerly | Synonyms: Tussilago farfara |
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| (noun) tufted evergreen perennial herb having spikes of tiny white flowers and glossy green round to heart-shaped leaves that become coppery to maroon or purplish in fall | Synonyms: beetleweed, galax, Galax urceolata, galaxy, wandflower |
| commotion | (noun) the act of making a noisy disturbance | Synonyms: din, ruckus, ruction, rumpus, tumult |
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| (noun) confused movement | Synonyms: whirl |
| (noun) a disorderly outburst or tumult | Synonyms: disruption, disturbance, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle, to-do |
| compatriot | (noun) a person from your own country | - |
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| complot | (verb) engage in plotting or enter into a conspiracy, swear together | Synonyms: cabal, conjure, conspire, machinate |
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| compote | (noun) dessert of stewed or baked fruit | Synonyms: fruit compote |
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| connotation | (noun) an idea that is implied or suggested | - |
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| (noun) what you must know in order to determine the reference of an expression | Synonyms: intension |
| connotational | (adjective) of or relating to a connotation | Synonyms: connotative of |
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| connotative | (adjective) having the power of implying or suggesting something in addition to what is explicit | - |
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| connote | (verb) involve as a necessary condition of consequence; as in logic | Synonyms: predicate |
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| (verb) express or state indirectly | Synonyms: imply |
| contrafagotto | (noun) the bassoon that is the largest instrument in the oboe family | Synonyms: contrabassoon, double bassoon |
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| coot | (noun) slate-black slow-flying birds somewhat resembling ducks | - |
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| cooter | (noun) large river turtle of the southern United States and northern Mexico | Synonyms: Pseudemys concinna, river cooter |
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| cootie | (noun) a parasitic louse that infests the body of human beings | Synonyms: body louse, Pediculus corporis |
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| copilot | (noun) a relief pilot on an airplane | Synonyms: co-pilot |
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| coralroot | (noun) European bittercress having a knotted white rootstock | Synonyms: Cardamine bulbifera, coral-root bittercress, coralwort, Dentaria bulbifera |
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| corticotrophin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotrophin, adrenocorticotropic hormone, adrenocorticotropin, corticotropin |
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| corticotropin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotrophin, adrenocorticotropic hormone, adrenocorticotropin, corticotrophin |
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| cosmotron | (noun) a large proton synchrotron; uses frequency modulation of an electric field to accelerate protons | - |
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| costusroot | (noun) annual herb of the eastern Himalayas (Kashmir) having purple florets and a fragrant root that yields a volatile oil used in perfumery and for preserving furs | Synonyms: Saussurea costus, Saussurea lappa |
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| cot | (noun) a small bed that folds up for storage or transport | Synonyms: camp bed |
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| (noun) baby bed with high sides made of slats | Synonyms: crib |
| (noun) a sheath worn to protect a finger | Synonyms: fingerstall |
| cotan | (noun) ratio of the adjacent to the opposite side of a right-angled triangle | Synonyms: cotangent |
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| cotangent | (noun) ratio of the adjacent to the opposite side of a right-angled triangle | Synonyms: cotan |
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| cote | (noun) a small shelter for domestic animals (as sheep or pigeons) | - |
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| cotenant | (noun) one of two or more tenants holding title to the same property | - |
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| coterie | (noun) an exclusive circle of people with a common purpose | Synonyms: camp, clique, ingroup, inner circle, pack |
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| coterminous | (adjective) being of equal extent or scope or duration | Synonyms: coextensive, conterminous |
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| coterminously | (adverb) in a coterminous manner | - |
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| cothromboplastin | (noun) a coagulation factor formed in the kidney under the influence of vitamin K | Synonyms: factor VII, proconvertin, stable factor |
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| cotilion | (noun) a lively dance originating in France in the 18th century | Synonyms: cotillion |
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| (noun) a ball at which young ladies are presented to society | Synonyms: cotillion |
| cotillion | (noun) a lively dance originating in France in the 18th century | Synonyms: cotilion |
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| (noun) a ball at which young ladies are presented to society | Synonyms: cotilion |
| cotinga | (noun) passerine bird of New World tropics | Synonyms: chatterer |
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| cotoneaster | (noun) any shrub of the genus Cotoneaster: erect or creeping shrubs having richly colored autumn foliage and many small white to pinkish flowers followed by tiny red or black fruits | - |
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| cottage | (noun) a small house with a single story | Synonyms: bungalow |
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| cottager | (noun) someone who lives in a cottage | Synonyms: cottage dweller |
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| cottar | (noun) fastener consisting of a wedge or pin inserted through a slot to hold two other pieces together | Synonyms: cotter |
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| (noun) a peasant farmer in the Scottish Highlands | Synonyms: cotter |
| cotter | (noun) fastener consisting of a wedge or pin inserted through a slot to hold two other pieces together | Synonyms: cottar |
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| (noun) a medieval English villein | Synonyms: cottier |
| (noun) a peasant farmer in the Scottish Highlands | Synonyms: cottar |
| cottier | (noun) a medieval English villein | Synonyms: cotter |
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| cotton | (noun) fabric woven from cotton fibers | - |
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| (noun) thread made of cotton fibers | - |
| (noun) erect bushy mallow plant or small tree bearing bolls containing seeds with many long hairy fibers | Synonyms: cotton plant |
| (noun) soft silky fibers from cotton plants in their raw state | Synonyms: cotton fiber, cotton wool |
| (verb) take a liking to | - |
| cottonmouth | (noun) venomous semiaquatic snake of swamps in southern United States | Synonyms: Agkistrodon piscivorus, cottonmouth moccasin, water moccasin |
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| cottonseed | (noun) seed of cotton plants; source of cottonseed oil | - |
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| cottontail | (noun) common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks) | Synonyms: cottontail rabbit, wood rabbit |
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| cottonweed | (noun) any of various plants of the genus Froelichia found in sandy soils and on rocky slopes in warmer regions of America; grown for their spikes of woolly white flowers | - |
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| (noun) an American everlasting having foliage with soft wooly hairs and corymbose heads with pearly white bracts | Synonyms: Anaphalis margaritacea, pearly everlasting |
| cottonwick | (noun) of warm Atlantic waters | Synonyms: Haemulon malanurum |
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| cottonwood | (noun) any of several North American trees of the genus Populus having a tuft of cottony hairs on the seed | - |
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| (noun) American basswood of the Allegheny region | Synonyms: Tilia heterophylla, white basswood |
| cottony | (adjective) resembling cotton; as soft as cotton | - |
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| cotyledon | (noun) embryonic leaf in seed-bearing plants | Synonyms: seed leaf |
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| cotyloid | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: acetabular, cotyloidal |
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| cotyloidal | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: acetabular, cotyloid |
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| counterplot | (noun) a plot intended to subvert another plot | Synonyms: counterplan |
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| (verb) make a plot in response to another plot | - |
| countershot | (noun) a return shot; a retaliatory shot | - |
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| coyote | (noun) small wolf native to western North America | Synonyms: brush wolf, Canis latrans, prairie wolf |
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| (noun) a forest fire fighter who is sent to battle remote and severe forest fires (often for days at a time) | - |
| (noun) someone who smuggles illegal immigrants into the United States (usually across the Mexican border) | - |
| crackpot | (noun) a whimsically eccentric person | Synonyms: crank, fruitcake, nut, nut case, screwball |
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| craniotomy | (noun) a surgical opening through the skull | - |
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| crapshoot | (noun) playing craps | Synonyms: crap game, crap shooting |
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| (noun) a risky and uncertain venture | - |
| crapshooter | (noun) a gambler who plays the game of craps | - |
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| creosote | (noun) a colorless or yellowish oily liquid obtained by distillation of wood tar; used as an antiseptic | - |
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| (noun) a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood | Synonyms: coal-tar creosote |
| (verb) treat with creosote | - |
| crinkleroot | (noun) North American herb with pungent scaly or toothed roots | Synonyms: Cardamine diphylla, crinkle-root, crinkle root, Dentaria diphylla, pepper root, toothwort |
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| crotal | (noun) any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made | Synonyms: crottal, crottle |
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| crotalaria | (noun) any of various plants of the genus Crotalaria having inflated pods within which the seeds rattle; used for pasture and green-manure crops | Synonyms: rattlebox |
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| crotaphion | (noun) the tip of the greater wing of the sphenoid bone | - |
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| crotch | (noun) the angle formed by the inner sides of the legs where they join the human trunk | Synonyms: fork |
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| (noun) external sex organ | Synonyms: genital organ, genitalia, genitals, private parts, privates |
| (noun) the region of the angle formed by the junction of two branches | Synonyms: fork |
| crotchet | (noun) a small tool or hooklike implement | - |
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| (noun) a strange attitude or habit | Synonyms: oddity, queerness, quirk, quirkiness |
| (noun) a musical note having the time value of a quarter of a whole note | Synonyms: quarter note |
| (noun) a sharp curve or crook; a shape resembling a hook | Synonyms: hook |
| crotchetiness | (noun) a fussy and eccentric disposition | Synonyms: contrariness, crankiness, grumpiness |
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| crotchety | (adjective) having a difficult and contrary disposition | Synonyms: cantankerous, ornery |
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| croton | (noun) tropical Asiatic shrub; source of croton oil | Synonyms: Croton tiglium |
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| (noun) grown in many varieties for their brightly colored foliage; widely cultivated as a houseplant | Synonyms: Codiaeum variegatum |
| crotonbug | (noun) small light-brown cockroach brought to United States from Europe; a common household pest | Synonyms: Blattella germanica, Croton bug, German cockroach, water bug |
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| crottal | (noun) any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made | Synonyms: crotal, crottle |
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| crottle | (noun) any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made | Synonyms: crotal, crottal |
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| crowfoot | (noun) any of various plants of the genus Ranunculus | Synonyms: butter-flower, buttercup, butterflower, goldcup, kingcup |
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