15-letter words containing o, c, t, a
- chelsea tractor — a four-by-four
- chemical toilet — a toilet in which waste is treated with chemicals
- chemoattractant — a chemical substance that provokes chemotaxis, esp one that causes a bacterium to move in the direction in which its concentration is increasing
- chemoautotrophs — Plural form of chemoautotroph.
- chemoautotrophy — the process of deriving energy through oxidizing inorganic chemical compounds, as opposed to photosynthesis
- chemopsychiatry — the study and application of chemical substances in psychiatry
- chemosterilants — Plural form of chemosterilant.
- chemotaxonomist — a specialist in the field of chemotaxonomy
- chewing tobacco — tobacco, in the form of a plug, usually flavored, for chewing rather than smoking.
- chicago heights — a city in NE Illinois, S of Chicago.
- chief constable — A Chief Constable is the officer who is in charge of the police force in a particular county or area in Britain.
- child abduction — the crime of removing a child from its rightful home
- chimney-pot hat — a high silk hat; top hat.
- chloral hydrate — a colourless crystalline soluble solid produced by the reaction of chloral with water and used as a sedative and hypnotic; 2,2,2-trichloro-1,1-ethanediol. Formula: CCl3CH(OH)2
- chocolate brown — a dark brown
- cholangiectasis — Dilation of the bile ducts.
- cholesterolemia — the presence of an abnormal amount of cholesterol in the blood.
- chorda tendinea — any of the tendons extending from the papillary muscles to the atrioventricular valves and preventing the valves from moving into the atria during ventricular contraction.
- chorioallantoic — relating to the chorioallantois
- chorioallantois — the membrane of a fetus that is formed by the merging of the allantois and the chorion
- christmas carol — a joyful hymn or religious song, celebrating the birth of Christ
- chromatic scale — a twelve-note scale including all the semitones of the octave
- chromatographer — A person skilled in chromatography or who operates a chromatograph.
- chromatographic — (analytical chemistry) Of or pertaining to chromatography.
- chromic acetate — a grayish-green, water-soluble powder, Cr(C 2 H 3 O 2) 3 ⋅H 2 O, used chiefly as a mordant in dyeing and printing textiles.
- chromium-plated — having been plated with chromium
- cigarette smoke — the acrid smoke produced by cigarettes being smoked
- cinematographed — a motion-picture projector.
- cinematographer — A cinematographer is a person who decides what filming techniques should be used during the shooting of a film.
- cinematographic — a motion-picture projector.
- circularisation — Alternative spelling of circularization.
- circularization — to circulate (a letter, memorandum, etc.).
- circumnavigator — A person who circumnavigates; that is, sails around the world.
- circumvallation — surrounded by or as if by a rampart.
- city councilman — a member of a city council
- city of glasgow — a council area in W central Scotland. Pop: 593 000 (2010 est). Area: 175 sq km (68 sq miles)
- ciudad trujillo — former name (1936–61) of Santo Domingo.
- ciudad victoria — a city in E central Mexico, capital of Tamaulipas state. Pop: 285 000 (2005 est)
- civilianization — the conversion from military to civilian status
- classifications — Plural form of classification.
- claustrophobics — Plural form of claustrophobic.
- cleistogamously — in a cleistogamous manner
- cleptoparasites — Plural form of cleptoparasite.
- climate control — air conditioning in a building or vehicle
- climb indicator — an instrument that shows the rate of ascent or descent of an aircraft, operating on a differential pressure principle.
- closed fracture — simple fracture.
- closed interval — an interval on the real line including its end points, as [0, 1], the set of reals between and including 0 and 1
- closed traverse — a traverse ending at its point of origin.
- clotting factor — any one of a group of substances, including factor VIII, the presence of which in the blood is essential for blood clotting to occur
- coaling station — a port at which vessels can take on coal