| cyan | (adjective) of the blue-green color that is a primary subtractive color of light | - |
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| (noun) a primary subtractive color for light; has a blue-green color | - |
| cyanamid | (noun) a weak soluble dibasic acid (the parent acid of cyanamide salts) | Synonyms: cyanamide |
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| cyanamide | (noun) a weak soluble dibasic acid (the parent acid of cyanamide salts) | Synonyms: cyanamid |
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| (noun) a compound used as a fertilizer and as a source of nitrogen compounds | Synonyms: calcium-cyanamide |
| cyanide | (noun) an extremely poisonous salt of hydrocyanic acid | - |
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| (noun) any of a class of organic compounds containing the cyano radical -CN | Synonyms: nitril, nitrile |
| cyanite | (noun) a grey or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory | Synonyms: kyanite |
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| cyanobacteria | (noun) predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton | Synonyms: blue-green algae |
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| cyanobacterial | (adjective) relating to or caused by photosynthetic bacteria of the class Cyanobacteria | Synonyms: cyanophyte |
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| cyanocobalamin | (noun) a B vitamin that is used to treat pernicious anemia | Synonyms: antipernicious anemia factor, cobalamin, vitamin B12 |
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| cyanogen | (noun) a colorless toxic gas with a pungent almond odor; has been used in chemical warfare | - |
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| cyanogenetic | (adjective) capable of producing cyanide | Synonyms: cyanogenic |
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| cyanogenic | (adjective) capable of producing cyanide | Synonyms: cyanogenetic |
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| cyanohydrin | (noun) any organic compound in which the cyano radical -CN and the hydroxyl radical -OH are attached to the same carbon atom | - |
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| cyanophyte | (adjective) relating to or caused by photosynthetic bacteria of the class Cyanobacteria | Synonyms: cyanobacterial |
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| cyanosis | (noun) a bluish discoloration of the skin and mucous membranes | - |
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| cyanuramide | (noun) a white crystalline organic base; used mainly in making melamine resins | Synonyms: melamine |
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| cyberart | (noun) art that is produced with the help of computer hardware and software | - |
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| cybercafe | (noun) a cafe whose customers sit at computer terminals and log on to the internet while they eat and drink | - |
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| cybercrime | (noun) crime committed using a computer and the internet to steal a person's identity or sell contraband or stalk victims or disrupt operations with malevolent programs | - |
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| cyberculture | (noun) the culture that emerges from the use of computers for communication and entertainment and business | - |
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| cybernate | (verb) control a function, process, or creation by a computer | Synonyms: computerise, computerize |
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| cybernation | (noun) the control of processes by computer | Synonyms: computerization |
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| cybernaut | (noun) a computer user who uses the internet; someone who explores cyberspace | - |
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| cybernetic | (adjective) of or relating the principles of cybernetics | - |
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| cybernetics | (noun) (biology) the field of science concerned with processes of communication and control (especially the comparison of these processes in biological and artificial systems) | - |
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| cyberphobia | (noun) irrational fear of computers or technology | - |
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| cyberpunk | (noun) a genre of fast-paced science fiction involving oppressive futuristic computerized societies | - |
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| (noun) a writer of science fiction set in a lawless subculture of an oppressive society dominated by computer technology | - |
| (noun) a programmer who breaks into computer systems in order to steal or change or destroy information as a form of cyber-terrorism | Synonyms: cyber-terrorist |
| cybersex | (noun) sexual arousal involving communication on the internet | - |
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| cyberspace | (noun) a computer network consisting of a worldwide network of computer networks that use the TCP/IP network protocols to facilitate data transmission and exchange | Synonyms: internet, net |
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| cyberwar | (noun) an assault on electronic communication networks | Synonyms: cyber-terrorism |
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| cyborg | (noun) a human being whose body has been taken over in whole or in part by electromechanical devices | - |
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| cycad | (noun) any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves | - |
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| cyclamate | (noun) any salt or ester of cyclamic acid. | - |
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| cyclamen | (noun) Mediterranean plant widely cultivated as a houseplant for its showy dark green leaves splotched with silver and nodding white or pink to reddish flowers with reflexed petals | Synonyms: Cyclamen purpurascens |
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| cycle | (noun) a wheeled vehicle that has two wheels and is moved by foot pedals | Synonyms: bicycle, bike, wheel |
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| (noun) a single complete execution of a periodically repeated phenomenon | Synonyms: oscillation |
| (noun) a periodically repeated sequence of events | - |
| (noun) a series of poems or songs on the same theme | - |
| (noun) an interval during which a recurring sequence of events occurs | Synonyms: rhythm, round |
| (noun) the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz) | Synonyms: cps, cycle per second, cycles/second, hertz, Hz |
| (verb) recur in repeating sequences | - |
| (verb) ride a motorcycle | Synonyms: motorbike, motorcycle |
| (verb) ride a bicycle | Synonyms: bicycle, bike, pedal, wheel |
| (verb) pass through a cycle | - |
| (verb) cause to go through a recurring sequence | - |
| cyclic | (adjective) recurring in cycles | Synonyms: cyclical |
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| (adjective) of a compound having atoms arranged in a ring structure | - |
| (adjective) forming a whorl or having parts arranged in a whorl | - |
| (adjective) conforming to the Carnot cycle | - |
| (adjective) marked by repeated cycles | - |
| cyclical | (adjective) recurring in cycles | Synonyms: cyclic |
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| cyclicity | (noun) the quality of recurring at regular intervals | Synonyms: periodicity |
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| cycling | (noun) the sport of traveling on a bicycle or motorcycle | - |
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| cyclist | (noun) a person who rides a bicycle | Synonyms: bicycler, bicyclist, biker, wheeler |
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| cycloalkene | (noun) alkene hydrocarbon which contains a closed ring of carbon atoms, but has no aromatic character. | Synonyms: cycloolefin |
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| cyclobenzaprine | (noun) muscle relaxant (trade name Flexeril) used for muscle spasms or acute injury | Synonyms: Flexeril |
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| cyclohexanol | (noun) a colorless oily alcohol that smells like camphor | - |
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| cycloid | (adjective) resembling a circle | Synonyms: cycloidal |
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| (noun) a line generated by a point on a circle rolling along a straight line | - |
| cycloidal | (adjective) resembling a circle | Synonyms: cycloid |
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| cyclonal | (adjective) of or relating to or characteristic of a violent tropical storm | Synonyms: cyclonic, cyclonical |
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| (adjective) of or relating to or characteristic of the atmosphere around a low pressure center | Synonyms: cyclonic, cyclonical |
| cyclone | (noun) a violent rotating windstorm | - |
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| (noun) (meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the Northern Hemisphere and clockwise in the southern | - |
| cyclonic | (adjective) of or relating to or characteristic of a violent tropical storm | Synonyms: cyclonal, cyclonical |
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| (adjective) of or relating to or characteristic of the atmosphere around a low pressure center | Synonyms: cyclonal, cyclonical |
| cyclonical | (adjective) of or relating to or characteristic of a violent tropical storm | Synonyms: cyclonal, cyclonic |
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| (adjective) of or relating to or characteristic of the atmosphere around a low pressure center | Synonyms: cyclonal, cyclonic |
| cycloolefin | (noun) alkene hydrocarbon which contains a closed ring of carbon atoms, but has no aromatic character. | Synonyms: cycloalkene |
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| cyclooxygenase | (noun) either of two related enzymes that control the production of prostaglandins and are blocked by aspirin | Synonyms: Cox |
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| cyclopaedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopedia, encyclopaedia, encyclopedia |
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| cyclopean | (adjective) of or relating to or resembling the Cyclops | - |
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| cyclopedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopaedia, encyclopaedia, encyclopedia |
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| cyclopia | (noun) a developmental abnormality in which there is only one eye | - |
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| cyclopropane | (noun) a colorless flammable gas sometimes used as an inhalation anesthetic | - |
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| cyclops | (noun) minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming; important in some food chains and as intermediate hosts of parasitic worms that affect man e.g. Guinea worms | Synonyms: water flea |
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| cyclorama | (noun) a picture (or series of pictures) representing a continuous scene | Synonyms: diorama, panorama |
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| cycloserine | (noun) an antibiotic that is especially active against the tubercle bacillus | - |
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| cyclosis | (noun) the circulation of cytoplasm within a cell | Synonyms: streaming |
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| cyclostome | (noun) primitive aquatic vertebrate | - |
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| cyclostyle | (noun) a writing implement with a small toothed wheel that cuts small holes in a stencil | - |
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| (verb) print with an implement with small toothed wheels that cuts small holes in a stencil | - |
| cyclothymia | (noun) a mild bipolar disorder that persists over a long time | Synonyms: cyclic disorder, cyclothymic disorder |
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| cyclothymic | (adjective) of or relating to or exhibiting cyclothymia | - |
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| cyclotron | (noun) an accelerator that imparts energies of several million electron-volts to rapidly moving particles | - |
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| cyder | (noun) a beverage made from juice pressed from apples | Synonyms: cider |
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| cygnet | (noun) a young swan | - |
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| cylinder | (noun) a cylindrical container for oxygen or compressed air | - |
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| (noun) a chamber within which piston moves | Synonyms: piston chamber |
| (noun) a surface generated by rotating a parallel line around a fixed line | - |
| (noun) a solid bounded by a cylindrical surface and two parallel planes (the bases) | - |
| cylindric | (adjective) having the form of a cylinder | Synonyms: cylindrical |
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| cylindrical | (adjective) having the form of a cylinder | Synonyms: cylindric |
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| cylindricality | (noun) the roundness of a 3-dimensional cylinder | Synonyms: cylindricalness |
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| cylindricalness | (noun) the roundness of a 3-dimensional cylinder | Synonyms: cylindricality |
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| cylix | (noun) a shallow drinking cup with two handles; used in ancient Greece | Synonyms: kylix |
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| cyma | (noun) (architecture) a molding for a cornice; in profile it is shaped like an S (partly concave and partly convex) | Synonyms: cymatium |
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| cymatium | (noun) (architecture) a molding for a cornice; in profile it is shaped like an S (partly concave and partly convex) | Synonyms: cyma |
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| cymbal | (noun) a percussion instrument consisting of a concave brass disk; makes a loud crashing sound when hit with a drumstick or when two are struck together | - |
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| cymbalist | (noun) a performer on the cymbals | - |
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| cymbid | (noun) any of various plants of the genus Cymbidium having narrow leaves and a long drooping cluster of numerous showy and variously colored boat-shaped flowers; extensively hybridized and cultivated as houseplants and important florists' flowers | Synonyms: cymbidium |
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| cymbidium | (noun) any of various plants of the genus Cymbidium having narrow leaves and a long drooping cluster of numerous showy and variously colored boat-shaped flowers; extensively hybridized and cultivated as houseplants and important florists' flowers | Synonyms: cymbid |
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| cyme | (noun) more or less flat-topped cluster of flowers in which the central or terminal flower opens first | - |
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| cymene | (noun) any of three isotopes of a colorless aromatic liquid hydrocarbon occurring in the volatile oil of cumin and thyme and used in the manufacture of synthetic resins | - |
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| cymling | (noun) squash plant having flattened round fruit with a scalloped edge; usually greenish white | Synonyms: pattypan squash |
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| cymograph | (noun) scientific instrument consisting of a rotating drum holding paper on which a stylus traces a continuous record (as of breathing or blood pressure) | Synonyms: kymograph |
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| cymose | (adjective) having a usually flat-topped flower cluster in which the main and branch stems each end in a flower that opens before those below it or to its side | - |
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| cymule | (noun) a small cyme, generally with few flowers | - |
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| cynancum | (noun) any of various mostly giant tropical lianas of Africa and Madagascar having greenish or purple flowers and long smooth pods; roots formerly used as an emetic | - |
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| cynic | (noun) someone who is critical of the motives of others | Synonyms: faultfinder |
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| cynical | (adjective) believing the worst of human nature and motives; having a sneering disbelief in e.g. selflessness of others | Synonyms: misanthropic, misanthropical |
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| cynically | (adverb) with cynicism; in a cynical manner | - |
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| cynicism | (noun) a cynical feeling of distrust | - |
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| cynodont | (noun) small carnivorous reptiles | - |
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| cynophobia | (noun) a morbid fear of dogs | - |
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| cynosure | (noun) something that strongly attracts attention and admiration | - |
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| (noun) something that provides guidance (as Polaris guides mariners) | - |
| cypher | (noun) a secret method of writing | Synonyms: cipher, cryptograph, secret code |
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| (noun) a message written in a secret code | Synonyms: cipher |
| (noun) a person of no influence | Synonyms: cipher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cipher, nought, zero |
| (verb) make a mathematical calculation or computation | Synonyms: calculate, cipher, compute, figure, reckon, work out |
| (verb) convert ordinary language into code | Synonyms: cipher, code, encipher, encrypt, inscribe, write in code |
| cypre | (noun) large tropical American tree of the genus Cordia grown for its abundant creamy white flowers and valuable wood | Synonyms: Cordia alliodora, Equador laurel, princewood, salmwood, Spanish elm |
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| cypress | (noun) any of numerous evergreen conifers of the genus Cupressus of north temperate regions having dark scalelike leaves and rounded cones | Synonyms: cypress tree |
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| (noun) wood of any of various cypress trees especially of the genus Cupressus | - |
| cyprian | (adjective) resembling the ancient orgiastic worship of Aphrodite on Cyprus | - |
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| (noun) a woman who engages in sexual intercourse for money | Synonyms: bawd, cocotte, fancy woman, harlot, lady of pleasure, prostitute, sporting lady, tart, whore, woman of the street, working girl |
| cyprinid | (adjective) of or relating to members of fish family Cyprinidae | Synonyms: cyprinoid |
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| (noun) soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales | Synonyms: cyprinid fish |
| cyprinodont | (noun) any member of the family Cyprinodontidae | - |
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| cyprinoid | (adjective) of or relating to members of fish family Cyprinidae | Synonyms: cyprinid |
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| cypripedia | (noun) a plant or flower of the genus Cypripedium | - |
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