| cyan | (noun) a primary subtractive color for light; has a blue-green color | - |
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| 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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| 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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| 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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| 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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| 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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| 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 |
| 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 | (noun) a line generated by a point on a circle rolling along a straight line | - |
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| 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 | - |
| 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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| 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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| cyclothymia | (noun) a mild bipolar disorder that persists over a long time | Synonyms: cyclic disorder, cyclothymic disorder |
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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) | - |
| 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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| 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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| 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 |
| 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 | (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 |
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| cyprinid | (noun) soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales | Synonyms: cyprinid fish |
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| cyprinodont | (noun) any member of the family Cyprinodontidae | - |
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| cypripedia | (noun) a plant or flower of the genus Cypripedium | - |
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| cyproheptadine | (noun) an antihistamine (trade name Periactin) used to treat some allergic reactions | Synonyms: Periactin |
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| cyrilla | (noun) shrub or small tree of southeastern United States to West Indies and Brazil; grown for the slender racemes of white flowers and orange and crimson foliage | Synonyms: Cyrilla racemiflora, leatherwood, white titi |
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| cyst | (noun) a small anatomically normal sac or bladderlike structure (especially one containing fluid) | Synonyms: vesicle |
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| (noun) a closed sac that develops abnormally in some body structure | - |
| cysteine | (noun) an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine | - |
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| cystine | (noun) a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones | - |
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| cystitis | (noun) inflammation of the urinary bladder and ureters | - |
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| cystocele | (noun) hernia in which the urinary bladder protrudes through the wall of the vagina; sometimes occurs after childbirth | Synonyms: colpocystocele |
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| cystolith | (noun) a calculus formed in the bladder | Synonyms: bladder stone |
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| cystoparalysis | (noun) paralysis of the urinary bladder | Synonyms: cystoplegia |
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| cystoplegia | (noun) paralysis of the urinary bladder | Synonyms: cystoparalysis |
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| cytidine | (noun) a nucleoside component of DNA; composed of cytosine and deoxyribose | Synonyms: deoxycytidine |
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| cytoarchitectonics | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitecture |
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| cytoarchitecture | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitectonics |
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| cytochrome | (noun) (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration) | - |
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| cytogenesis | (noun) the origin and development and variation of cells | Synonyms: cytogeny |
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| cytogeneticist | (noun) a geneticist who specializes in the cellular components associated with heredity | - |
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| cytogenetics | (noun) the branch of biology that studies the cellular aspects of heredity (especially the chromosomes) | - |
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| cytogeny | (noun) the origin and development and variation of cells | Synonyms: cytogenesis |
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| cytokine | (noun) any of various protein molecules secreted by cells of the immune system that serve to regulate the immune system | - |
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| cytokinesis | (noun) organic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cells | - |
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