12-letter words containing r, a, t, o
- choirmasters — Plural form of choirmaster.
- chondroblast — a type of cell that develops into a chondrocyte or cartilage cell
- chondrostian — relating to the class Chondrostei of fish with fin rays
- choroid coat — a pigmented, highly vascular membrane of the eye that is continuous with the iris and lies between the sclera and the retina, functioning to nourish the retina and absorb scattered light.
- chorusmaster — the conductor of a choir
- chota nagpur — a plateau in E India, mainly in Jharkhand state since 2000: forested, with rich mineral resources and much heavy industry; produces chiefly lac (world's leading supplier), coal (half India's total output), and mica
- choux pastry — a very light pastry made with eggs, used for eclairs, etc
- chrestomathy — a collection of literary passages, used in the study of language
- christophany — an appearance or emergence of Christ following his crucifixion
- chromaticism — the use of chromatic tones.
- chromaticity — the quality of a colour or light with reference to its purity and its dominant wavelength
- chromatogram — a column or strip of material containing constituents of a mixture separated by chromatography
- chromatology — chromatics.
- chromatophil — Also, chromatophilic, chromatophilous [kroh-muh-tof-uh-luh s] /ˌkroʊ məˈtɒf ə ləs/ (Show IPA). chromophil (def 1).
- chromatopsia — an irregularity in the ability to see colours properly
- chromonemata — a chromosome thread that is relatively uncoiled at early prophase but assumes a spiral form at metaphase.
- chromoplasts — Plural form of chromoplast.
- chukot range — mountain range in NE Siberia: highest peak, c. 7,500 ft (2,286 m)
- circulations — Plural form of circulation.
- circumrotary — Alternative form of circumrotatory.
- circumrotate — to turn like a wheel; rotate
- cirrostratus — a uniform layer of cloud above about 6000 metres (20 000 feet)
- claims ratio — The claims ratio is the percentage of claims costs incurred in relation to the premiums earned.
- clairvoyants — Plural form of clairvoyant.
- clara barton — Clara, 1821–1912, U.S. philanthropist who organized the American Red Cross in 1881.
- claustration — the act of confining to a small space (usually a cloister)
- clayton fern — a tall fern, Osmunda claytoniana, of eastern North America and eastern Asia, having an interruption of growth in the center of some fronds.
- clerofascist — A cleric supporting fascism or advocating a synthesis of religion and fascism.
- closet drama — drama suitable for reading rather than performing
- clothes rack — a framework for holding or displaying clothes in a shop
- clotrimazole — An antifungal medication used to treat humans and animals.
- co-operative — A co-operative is a business or organization run by the people who work for it, or owned by the people who use it. These people share its benefits and profits.
- co-ordinator — a person or thing that coordinates.
- co-parenting — a divorced or separated parent who shares equally with the other parent in the custody and care of a child.
- coacervation — a reversible, emulsoid stage existing between the sol and gel formations, in which the addition of a third substance causes the separation of the sol into two immiscible liquid phases: an essential stage in the formation of proteins, antibodies, etc.
- coast ranges — series of mountain ranges along the W coast of North America, extending from Alas. to Baja California: highest peak, Mt. Logan
- coat of arms — The coat of arms of a family, town, or organization is a special design in the form of a shield that they use as a symbol of their identity.
- coat protein — any protein that is a constituent of the capsid of a virus.
- coated paper — a paper whose surface has been treated to take halftone impressions or color printing
- cobalt green — a medium, yellowish-green color.
- cock feather — the odd-coloured feather set on the shaft of an arrow at right angles to the nock
- cocktail bar — a bar which serves cocktails
- cocoa butter — a yellowish-white waxy solid that is obtained from cocoa beans and used for confectionery, soap, etc
- coconut crab — a large, terrestrial crab, Birgus latro, of islands in the South Pacific, that feeds on coconuts.
- coelenterata — the phylum comprising the coelenterates.
- coelenterate — any invertebrate of the phylum Cnidaria (formerly Coelenterata), having a saclike body with a single opening (mouth), which occurs in polyp and medusa forms. Coelenterates include the hydra, jellyfishes, sea anemones, and corals
- cogeneration — the process of generating electricity and steam from the same power plant
- cogenerators — Plural form of cogenerator.
- coir matting — a floor covering or packing material made of coir
- cold storage — If something such as food is put in cold storage, it is kept in an artificially-cooled place in order to preserve it.