13-letter words containing a, c, o, s
- choripetalous — polypetalous
- chrestomathic — (of teaching or learning) That has a practical use.
- christmas box — a tip or present given at Christmas, esp to postmen, tradesmen, etc
- chromaticness — the attribute of colour that involves both hue and saturation
- chromatograms — Plural form of chromatogram.
- chromatolysis — the dissolution of stained material, such as chromatin in injured cells
- chromesthesia — (neurology, psychology) sound-to-color synaesthesia.
- chromosomally — With reference to chromosomes.
- chrysocarpous — bearing golden-yellow fruit.
- chrysotherapy — gold therapy.
- ciceronianism — imitation of the style of Cicero, especially as practiced by some writers and orators during the Renaissance.
- cinchonaceous — relating to cinchona
- cinema goers' — filmgoer.
- city dionysia — (in ancient Athens) the chief festival in honor of Dionysus, celebrated in early spring and notable for the performance of dithyrambs, tragedies, comedies, and satyr plays.
- civilisations — Plural form of civilisation.
- civilizations — Plural form of civilization.
- clair-obscure — chiaroscuro.
- clamorousness — The state or quality of being clamorous.
- clapperboards — Plural form of clapperboard.
- clare-obscure — chiaroscuro.
- class society — a society in which class distinctions are influential
- claustrophobe — a person who suffers from claustrophobia.
- clavichordist — Someone who plays the clavichord.
- clearinghouse — If an organization acts as a clearinghouse, it collects, sorts, and distributes specialized information.
- cleistogamous — having small, unopened, self-pollinating flowers, usually in addition to the showier flowers
- cleistothecia — (in certain ascomycetous fungi) a closed, globose ascocarp from which the ascospores are released only by its rupture or decay.
- cleptomaniacs — kleptomania.
- cliff swallow — an American swallow, Petrochelidon pyrrhonota, that has a square-tipped tail and builds nests of mud on cliffs, walls, etc
- climatologist — A climatologist is someone who studies climates.
- clistocarpous — Mycology. having cleistothecia.
- close at hand — lying in the near future or vicinity; nearby or imminent.
- close company — a company under the control of its directors or fewer than five independent participants
- close harmony — a type of singing in which all the parts except the bass lie close together and are confined to the compass of a tenth
- close-at-hand — lying in the near future or vicinity; nearby or imminent.
- close-grained — (of wood) dense or compact in texture
- closed season — The closed season is the period of the year when it is prohibited to kill certain types of animal or fish.
- closed stance — a batting stance in which the front foot is positioned closer to the inside of the batter's box than the back foot.
- clothesbasket — a basket for holding and carrying laundry.
- co-authorship — the state a coauthor
- coach station — A coach station is an area or a building which coaches leave from or arrive at on regular journeys.
- coachbuilders — Plural form of coachbuilder.
- coadjutorship — the state of being a coadjutor
- coal industry — a branch of commercial enterprise concerned with the discovery and mining of coal
- coal measures — a series of coal-bearing rocks formed in the upper Carboniferous period; the uppermost series of the Carboniferous system
- coalesced sum — (theory) (Or "smash sum") In domain theory, the coalesced sum of domains A and B, A (+) B, contains all the non-bottom elements of both domains, tagged to show which part of the sum they come from, and a new bottom element. D (+) E = { bottom(D(+)E) } U { (0,d) | d in D, d /= bottom(D) } U { (1,e) | e in E, e /= bottom(E) } The bottoms of the constituent domains are coalesced into a single bottom in the sum. This may be generalised to any number of domains. The ordering is bottom(D(+)E) <= v For all v in D(+)E (i,v1) <= (j,v2) iff i = j & v1 <= v2 "<=" is usually written as LaTeX \sqsubseteq and "(+)" as LaTeX \oplus - a "+" in a circle.
- coarsegrained — having a coarse texture
- coast redwood — the redwood, Sequoia sempervirens.
- coastal plain — a plain extending along a coast.
- coaster brake — a brake on a bicycle that engages when the pedals are turned in reverse
- coasting lead — a lead used in sounding depths of from 20 to 60 fathoms.