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Glossary · Nouns · C

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TermTypeDefinitionClassificationsUpdated
Circletnoundecorated metal band worn around the headverifiedMay 18, 2026
Circuit BoardnounMWEa printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilitiesverifiedMay 18, 2026
Circuit BreakernounMWEa device that trips like a switch and opens the circuit when overloadedverifiedMay 18, 2026
Circuit CardnounMWEa printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilitiesverifiedMay 18, 2026
Circuit Court of AppealsnounMWEone of the twelve federal United States courts of appeals that cover a group of states known as a `circuit'verifiedMay 18, 2026
Circuit Switched NetworknounMWEA circuit switched network is where a single continuous physical circuit connected two endpoints where the route was immutable once set up.NetworkMay 12, 2026
Circuitrynounelectronic equipment consisting of a system of circuitsverifiedMay 18, 2026
Circular FilenounMWEa container with an open topverifiedMay 18, 2026
Circular FunctionnounMWEfunction of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angleverifiedMay 18, 2026
Circular MeasurenounMWEmeasurement of angles in radiansverifiedMay 18, 2026
Circular PlanenounMWEa plane with a flexible face that can plane concave or convex surfacesverifiedMay 18, 2026
Circular SawnounMWEa power saw that has a steel disk with cutting teeth on the peripheryverifiedMay 18, 2026
Circularisationnouncirculating printed notices as a means of advertisingverifiedMay 18, 2026
Circularitynounthe roundness of a 2-dimensional figureverifiedMay 18, 2026
Circularizationnouncirculating printed notices as a means of advertisingverifiedMay 18, 2026
Circulating DecimalnounMWEa decimal with a sequence of digits that repeats itself indefinitelyverifiedMay 18, 2026
Circulating LibrarynounMWElibrary that provides books for use outside the buildingverifiedMay 18, 2026
Circulationnoun(library science) the count of books that are loaned by a library over a specified periodverifiedMay 18, 2026
Circulatory FailurenounMWEfailure of the cardiovascular system to supply adequate amounts of blood to body tissuesverifiedMay 18, 2026
Circulatory SystemnounMWEthe organs and tissues involved in circulating blood and lymph through the bodyverifiedMay 18, 2026
Circumcisionnounthe act of circumcising performed on males eight days after birth as a Jewish and Muslim religious riteverifiedMay 18, 2026
Circumductionnouna circular movement of a limb or eyeverifiedMay 18, 2026
Circumferencenounthe size of something as given by the distance around itverifiedMay 18, 2026
Circumflexnouna diacritical mark (^) placed above a vowel in some languages to indicate a special phonetic qualityverifiedMay 18, 2026
Circumflex ArterynounMWEany of several paired curving arteriesverifiedMay 18, 2026
Circumflex Artery of the ThighnounMWEan artery that supplies the hip joint and thigh musclesverifiedMay 18, 2026
Circumflex Femoral VeinnounMWEeither of two veins that accompany arteries of the same name serving the hip and thighverifiedMay 18, 2026
Circumflex Humeral ArterynounMWEan artery that supplies the shoulder joint and shoulder musclesverifiedMay 18, 2026
Circumflex Iliac ArterynounMWEan artery that supplies the lower abdominal walls and skin and the sartorius muscleverifiedMay 18, 2026
Circumflex Iliac VeinnounMWEaccompanies the artery of the same nameverifiedMay 18, 2026
Circumflex Scapular ArterynounMWEan artery that serves the muscles of the shoulder and scapular areaverifiedMay 18, 2026
Circumflex VeinnounMWEany of several curved parallel veins accompanying arteries of the same nameverifiedMay 18, 2026
Circumlocutionnouna style that involves indirect ways of expressing thingsverifiedMay 18, 2026
Circumnavigationnountraveling around something (by ship or plane)verifiedMay 18, 2026
Circumscriptionnounthe act of circumscribingverifiedMay 18, 2026
Circumspectionnounknowing how to avoid embarrassment or distressverifiedMay 18, 2026
Circumstancenounthe set of facts or circumstances that surround a situation or eventverifiedMay 18, 2026
Circumstantial EvidencenounMWEevidence providing only a basis for inference about the fact in disputeverifiedMay 18, 2026
Circumventionnounthe act of evading by going aroundverifiedMay 18, 2026
Circumvolutionnounthe act of turning or winding or folding around a central axisverifiedMay 18, 2026
Circusnounan arena consisting of an oval or circular area enclosed by tiers of seats and usually covered by a tentverifiedMay 18, 2026
Circus AcrobatnounMWEan acrobat who performs acrobatic feats in a circusverifiedMay 18, 2026
Circus TentnounMWEa canvas tent to house the audience at a circus performanceverifiedMay 18, 2026
Cirionouncandlewood of Mexico and southwestern California having tall columnar stems and bearing honey-scented creamy yellow flowersverifiedMay 18, 2026
Cirquenouna steep-walled semicircular basin in a mountainverifiedMay 18, 2026
Cirrhosisnouna chronic disease interfering with the normal functioning of the liververifiedMay 18, 2026
Cirrhosis of the LivernounMWEa chronic disease interfering with the normal functioning of the liververifiedMay 18, 2026
Cirrhusnounusually coiledverifiedMay 18, 2026
Cirripednounmarine crustaceans with feathery food-catching appendagesverifiedMay 18, 2026
Cirripedenounmarine crustaceans with feathery food-catching appendagesverifiedMay 18, 2026
Cirrocumulusnouna cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripplesverifiedMay 18, 2026
Cirrocumulus CloudnounMWEa cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripplesverifiedMay 18, 2026
Cirrostratusnouna thin uniform layer of hazy cloud at high altitudeverifiedMay 18, 2026
Cirrostratus CloudnounMWEa thin uniform layer of hazy cloud at high altitudeverifiedMay 18, 2026
Cirrusnouna wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)verifiedMay 18, 2026
Cirrus CloudnounMWEa wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)verifiedMay 18, 2026
Cisconounimportant food fish of cold deep lakes of North AmericaverifiedMay 18, 2026
Cisternnouna sac or cavity containing fluid especially lymph or cerebrospinal fluidverifiedMay 18, 2026
Cisternanouna sac or cavity containing fluid especially lymph or cerebrospinal fluidverifiedMay 18, 2026
Cistronnounin genetics, a segment of DNA that is involved in producing a polypeptide chainverifiedMay 18, 2026
Citadelnouna stronghold into which people could go for shelter during a battleverifiedMay 18, 2026
Citationnoun(law) the act of citing (as of spoken words or written passages or legal precedents etc.)verifiedMay 18, 2026
Citation FormnounMWEthe form of a word that heads a lexical entry and is alphabetized in a dictionaryverifiedMay 18, 2026
Cithernouna 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire stringsverifiedMay 18, 2026
Cithernnouna 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire stringsverifiedMay 18, 2026
Citizennouna native or naturalized member of a state or other political communityverifiedMay 18, 2026
Citizenrynounthe body of citizens of a state or countryverifiedMay 18, 2026
Citizens CommitteenounMWEa self-constituted organization to promote somethingverifiedMay 18, 2026
Citizenshipnounthe status of a citizen with rights and dutiesverifiedMay 18, 2026
Citolenouna 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire stringsverifiedMay 18, 2026
Citrangenounmore aromatic and acid tasting than orangesverifiedMay 18, 2026
Citrange TreenounMWEmore aromatic and acidic than orangesverifiedMay 18, 2026
Citric AcidnounMWEa weak water-soluble acid found in many fruits (especially citrus fruits)verifiedMay 18, 2026
Citric Acid CyclenounMWEin all plants and animals: a series of enzymatic reactions in mitochondria involving oxidative metabolism of acetyl compounds to produce high-energy phosphate compounds that are the source of cellular energyverifiedMay 18, 2026
Citrinnouna vitamin that maintains the resistance of cell and capillary walls to permeationverifiedMay 18, 2026
Citrinenounsemiprecious yellow quartz resembling topazverifiedMay 18, 2026
Citronnounthorny evergreen small tree or shrub of India widely cultivated for its large lemonlike fruits that have thick warty rindverifiedMay 18, 2026
Citron TreenounMWEthorny evergreen small tree or shrub of India widely cultivated for its large lemonlike fruits that have thick warty rindverifiedMay 18, 2026
Citronwoodnoundurable fragrant woodverifiedMay 18, 2026
Citrophilous MealybugnounMWEdestructive especially to citrusverifiedMay 18, 2026
Citrophilus MealybugnounMWEdestructive especially to citrusverifiedMay 18, 2026
Citrous FruitnounMWEany of numerous fruits of the genus Citrus having thick rind and juicy pulpverifiedMay 18, 2026
Citrullinenounan amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginineverifiedMay 18, 2026
Citrusnounany of numerous tropical usually thorny evergreen trees of the genus Citrus having leathery evergreen leaves and widely cultivated for their juicy edible fruits having leathery aromatic rindsverifiedMay 18, 2026
Citrus FruitnounMWEany of numerous fruits of the genus Citrus having thick rind and juicy pulpverifiedMay 18, 2026
Citrus MealybugnounMWEfeeds on a wide variety of cultivated plants but especially destructive to citrusverifiedMay 18, 2026
Citrus TreenounMWEany of numerous tropical usually thorny evergreen trees of the genus Citrus having leathery evergreen leaves and widely cultivated for their juicy edible fruits having leathery aromatic rindsverifiedMay 18, 2026
Citrus WhiteflynounMWEwhitefly that attacks citrus treesverifiedMay 18, 2026
Citternnouna 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire stringsverifiedMay 18, 2026
Citynounan incorporated administrative district established by state charterverifiedMay 18, 2026
City BlocknounMWEa rectangular area in a city surrounded by streets and usually containing several buildingsverifiedMay 18, 2026
City BoynounMWEa city dweller with sophisticated manners and clothingverifiedMay 18, 2026
City CenternounMWEthe central part of a cityverifiedMay 18, 2026
City CentrenounMWEthe central part of a cityverifiedMay 18, 2026
City CouncilnounMWEa municipal body that can pass ordinances and appropriate funds etc.verifiedMay 18, 2026
City DesknounMWEthe editorial department of a newspaper that edits the local newsverifiedMay 18, 2026
City DistrictnounMWEa district of a town or cityverifiedMay 18, 2026
City EditornounMWEthe newspaper editor in charge of editing local newsverifiedMay 18, 2026
City FathernounMWEan important municipal officialverifiedMay 18, 2026
City HallnounMWEa building that houses administrative offices of a municipal governmentverifiedMay 18, 2026