| cephalopodan | (adjective) relating or belonging to the class Cephalopoda | Synonyms: cephalopod |
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| ceratopsian | (noun) any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia | Synonyms: horned dinosaur |
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| ceroplastics | (noun) the art of modeling in wax. | - |
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| chalcopyrite | (noun) a yellow copper ore (CuFeS2) made up of copper and iron sulfide | Synonyms: copper pyrites |
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| cheiloscopy | (noun) a forensic investigation technique that deals with identification of humans based on lip traces. | - |
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| chemoautotroph | (noun) An organism that depends on chemicals for its energy and principally on carbon dioxide for its carbon. | Synonyms: chemotrophic autotroph |
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| chiropodist | (noun) a specialist in care for the feet | Synonyms: foot doctor, podiatrist |
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| chiropody | (noun) the branch of medicine concerned with the feet | Synonyms: podiatry |
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| chiropractic | (noun) a method of treatment that manipulates body structures (especially the spine) to relieve low back pain or even headache or high blood pressure | - |
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| 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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| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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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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| chlorophyllose | (adjective) relating to or being or containing chlorophyll | Synonyms: chlorophyllous |
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| chlorophyllous | (adjective) relating to or being or containing chlorophyll | Synonyms: chlorophyllose |
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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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| chondrodystrophy | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, achondroplasty, osteosclerosis congenita |
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| chop | (noun) a tennis return made with a downward motion that puts backspin on the ball | Synonyms: chop shot |
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| (noun) a grounder that bounces high in the air | Synonyms: chopper |
| (noun) a jaw | - |
| (noun) a small cut of meat including part of a rib | - |
| (noun) the irregular motion of waves (usually caused by wind blowing in a direction opposite to the tide) | - |
| (verb) hit sharply | - |
| (verb) cut with a hacking tool | Synonyms: hack |
| (verb) cut into pieces with repeated blows | Synonyms: chop up |
| (verb) strike sharply, as in some sports | - |
| (verb) form or shape by chopping | - |
| (verb) move suddenly | - |
| chopfallen | (adjective) brought low in spirit | Synonyms: chapfallen, crestfallen, deflated |
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| chophouse | (noun) a restaurant that specializes in steaks | Synonyms: steakhouse |
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| chopine | (noun) a woman's shoe with a very high thick sole | Synonyms: platform |
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| chopped | (adjective) prepared by cutting | Synonyms: shredded, sliced |
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| chopper | (noun) a grounder that bounces high in the air | Synonyms: chop |
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| (noun) a butcher's knife having a large square blade | Synonyms: cleaver, meat cleaver |
| (noun) an aircraft without wings that obtains its lift from the rotation of overhead blades | Synonyms: eggbeater, helicopter, whirlybird |
| (noun) informal terms for a human `tooth' | Synonyms: pearly |
| choppiness | (noun) used of the sea during inclement or stormy weather | Synonyms: rough water, roughness |
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| choppy | (adjective) rough with small waves | - |
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| (adjective) marked by abrupt transitions | Synonyms: jerky |
| chopsteak | (noun) a patty of ground cooked beef | Synonyms: beef patty, chop steak, chopped steak, hamburger steak |
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| chopstick | (noun) one of a pair of slender sticks used as oriental tableware to eat food with | - |
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| chordophone | (noun) a stringed instrument of the group including harps, lutes, lyres, and zithers | - |
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| chromophore | (noun) the chemical group that gives color to a molecule | - |
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| chromoplast | (noun) plastid containing pigments other than chlorophyll usually yellow or orange carotenoids | - |
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| chronoscope | (noun) an instrument for accurate measurements of small intervals of time | - |
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| chrysopid | (noun) pale green unpleasant-smelling lacewing fly having carnivorous larvae | Synonyms: green lacewing, stink fly |
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| chrysoprase | (noun) a green variety of chalcedony valued as a gemstone | - |
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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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| cladophyll | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladode, phylloclad, phylloclade |
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| claustrophobe | (noun) a person suffering from claustrophobia | - |
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| claustrophobia | (noun) a morbid fear of being closed in a confined space | - |
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| claustrophobic | (adjective) suffering from claustrophobia; abnormally afraid of closed-in places | - |
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| (adjective) uncomfortably closed or hemmed in | - |
| clodhopper | (noun) a thick and heavy shoe | Synonyms: brogan, brogue, work shoe |
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| clop | (noun) the sound of a horse's hoofs hitting on a hard surface | Synonyms: clip-clop, clippety-clop, clopping, clumping, clunking |
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| (verb) make or move along with a sound as of a horse's hooves striking the ground | Synonyms: clump, clunk, plunk |
| clopping | (noun) the sound of a horse's hoofs hitting on a hard surface | Synonyms: clip-clop, clippety-clop, clop, clumping, clunking |
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| codswallop | (noun) nonsensical talk or writing | Synonyms: applesauce, folderol, rubbish, trash, tripe, trumpery, wish-wash |
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| coelophysis | (noun) one of the oldest known dinosaurs; late Triassic; cannibalistic | - |
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| colonoscope | (noun) an elongated fiberoptic endoscope for examining the entire colon from cecum to rectum | - |
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| colonoscopy | (noun) visual examination of the colon (with a colonoscope) from the cecum to the rectum; requires sedation | - |
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| colophon | (noun) a publisher's emblem printed in a book (usually on the title page) | - |
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| colophony | (noun) translucent brittle substance produced from pine oleoresin; used especially in varnishes and inks and on the bows of stringed instruments | - |
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| colposcope | (noun) An endoscopic instrument that magnifies the epithelia of the vagina and cervix in vivo to allow direct observation and study of these tissues. | Synonyms: vaginoscope |
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| conidiophore | (noun) a specialized fungal hypha that produces conidia | - |
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| coop | (noun) an enclosure made or wire or metal bars in which birds or animals can be kept | Synonyms: cage |
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| (noun) a farm building for housing poultry | Synonyms: chicken coop, hencoop, henhouse |
| cooper | (noun) a craftsman who makes or repairs wooden barrels or tubs | Synonyms: barrel maker |
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| (verb) make barrels and casks | - |
| cooperate | (verb) work together on a common enterprise or project | Synonyms: collaborate, join forces |
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| cooperation | (noun) joint operation or action | - |
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| (noun) the practice of cooperating | - |
| cooperative | (adjective) done with or working with others for a common purpose or benefit | - |
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| (adjective) involving the joint activity of two or more | Synonyms: concerted, conjunct, conjunctive, united |
| (adjective) willing to adjust to differences in order to obtain agreement | Synonyms: accommodative |
| (noun) a jointly owned commercial enterprise (usually organized by farmers or consumers) that produces and distributes goods and services and is run for the benefit of its owners | Synonyms: co-op |
| (noun) an association formed and operated for the benefit of those using it | - |
| cooperatively | (adverb) in close cooperation | Synonyms: hand and glove, hand in glove |
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| cooperativeness | (noun) the trait of being cooperative | Synonyms: amenability, amenableness |
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| cooperator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: collaborator, pardner, partner |
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| cop | (noun) uncomplimentary terms for a policeman | Synonyms: bull, copper, fuzz, pig |
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| (verb) take into custody | Synonyms: apprehend, arrest, collar, nab, nail, pick up |
| (verb) take by theft | Synonyms: glom, hook, knock off, snitch, thieve |
| copacetic | (adjective) completely satisfactory | Synonyms: copasetic, copesetic, copesettic |
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| copaiba | (noun) an oleoresin used in varnishes and ointments | Synonyms: balsam capivi, copaiba balsam |
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| copal | (noun) a brittle aromatic resin used in varnishes | - |
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| copaline | (noun) partly mineralized copal dug from the ground | Synonyms: copalite, fossil copal |
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| copalite | (noun) partly mineralized copal dug from the ground | Synonyms: copaline, fossil copal |
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| copartner | (noun) a joint partner (as in a business enterprise) | - |
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| copartnership | (noun) a partnership in which employees get a share of the profits in addition to their wages | - |
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| copasetic | (adjective) completely satisfactory | Synonyms: copacetic, copesetic, copesettic |
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| cope | (noun) brick that is laid sideways at the top of a wall | Synonyms: coping, header |
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| (noun) a long cloak; worn by a priest or bishop on ceremonial occasions | - |
| (verb) succeed in doing, achieving, or producing (something) with the limited or inadequate means available | Synonyms: contend, deal, get by, grapple, make do, make out, manage |
| copeck | (noun) 100 kopecks equal 1 ruble in Russia | Synonyms: kopeck, kopek |
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| copepod | (noun) minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish | Synonyms: copepod crustacean |
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| copesetic | (adjective) completely satisfactory | Synonyms: copacetic, copasetic, copesettic |
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| copesettic | (adjective) completely satisfactory | Synonyms: copacetic, copasetic, copesetic |
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| copestone | (noun) a stone that forms the top of wall or building | Synonyms: capstone, coping stone, stretcher |
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| (noun) a final touch; a crowning achievement; a culmination | Synonyms: capstone, finishing touch |
| copier | (noun) apparatus that makes copies of typed, written or drawn material | Synonyms: duplicator |
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| copilot | (noun) a relief pilot on an airplane | Synonyms: co-pilot |
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| coping | (noun) brick that is laid sideways at the top of a wall | Synonyms: cope, header |
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| copious | (adjective) affording an abundant supply | Synonyms: ample, plenteous, plentiful, rich |
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| (adjective) large in number or quantity (especially of discourse) | Synonyms: voluminous |
| copiously | (adverb) in an abundant manner | Synonyms: abundantly, extravagantly, profusely |
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| copiousness | (noun) the property of a more than adequate quantity or supply | Synonyms: abundance, teemingness |
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| coplanar | (adjective) lying in the same plane | - |
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| copolymer | (noun) a polymer consisting of two or more different monomers | - |
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| copolymerise | (verb) polymerize together | Synonyms: copolymerize |
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| copolymerize | (verb) polymerize together | Synonyms: copolymerise |
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| copout | (noun) a failure to face some difficulty squarely | - |
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| copper | (noun) any of various small butterflies of the family Lycaenidae having coppery wings | - |
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| (noun) a reddish-brown color resembling the color of polished copper | Synonyms: copper color |
| (noun) uncomplimentary terms for a policeman | Synonyms: bull, cop, fuzz, pig |
| (noun) a copper penny | - |
| (noun) a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor | Synonyms: atomic number 29, Cu |
| (verb) coat with a layer of copper | - |
| copperhead | (noun) common coppery brown pit viper of upland eastern United States | Synonyms: Agkistrodon contortrix |
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| (noun) venomous but sluggish reddish-brown snake of Australia | Synonyms: Denisonia superba |
| copperplate | (noun) an engraving consisting of a smooth plate of copper that has been etched or engraved | Synonyms: copperplate engraving |
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| (noun) a print made from an engraved copperplate | - |
| (noun) a graceful style of handwriting based on the writing used on copperplate engravings | - |
| coppersmith | (noun) someone who makes articles from copper | - |
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| copperware | (noun) utensils made with copper | - |
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| coppery | (adjective) of something having the color of copper | Synonyms: copper colored |
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| coppice | (noun) a dense growth of bushes | Synonyms: brush, brushwood, copse, thicket |
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| copra | (noun) the dried meat of the coconut from which oil is extracted | - |
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| coprolalia | (noun) an uncontrollable use of obscene language; often accompanied by mental disorders | - |
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| coprolite | (noun) fossil excrement; petrified dung | - |
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| coprolith | (noun) a hard mass of fecal matter | Synonyms: faecalith, fecalith, stercolith |
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| coprophagia | (noun) eating feces; in human a symptom of some kinds of insanity | Synonyms: coprophagy |
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