12-letter words containing a, t, o, r
- cathodograph — a picture taken using cathode rays
- cattleperson — Someone who works with, or rears cattle.
- catty-corner — Something that is catty-corner or kitty-corner from another thing is placed or arranged diagonally from it.
- caught short — having a sudden need to urinate or defecate
- celebrations — Plural form of celebration.
- centerboards — Plural form of centerboard.
- centimorgans — Plural form of centimorgan.
- centroclinal — of, relating to, or designating a rock formation in which the strata slope down and in towards a central point or area
- centrolinead — a drafting instrument for drawing lines converging on a vanishing point outside the drawing.
- centrolineal — Of lines, converging to a centre.
- centuriation — the process or act of dividing land into centuries or equal areas undertaken by the Romans
- cephalometer — an instrument for positioning the human head for X-ray examination in cephalometry
- cephalometry — measurement of the dimensions of the human head by radiography: used mainly in orthodontics
- ceratopsians — Plural form of ceratopsian.
- cerebrations — Plural form of cerebration.
- cerebropathy — A hypochondriacal condition verging upon insanity, occurring in those whose brains have been unduly taxed.
- cerebrotonia — a personality type characterized by restraint, alertness, and an intellectual approach to life: said to be correlated with an ectomorph body type
- ceroplastics — the art of wax modelling
- cerotic acid — white insoluble odourless wax
- chaetiferous — having bristles
- chalcopyrite — a widely distributed yellow mineral consisting of a sulphide of copper and iron in tetragonal crystalline form: the principal ore of copper. Formula: CuFeS2
- chalicothere — any of various very large extinct Tertiary horselike perissodactyl mammals that had clawed feet but otherwise resembled titanotheres
- chamber tomb — a prehistoric tomb with a chamber inside it in which the body of an important person was laid to rest
- change front — to redeploy (a force in the field) so that its main weight of weapons points in another direction
- channel port — one of the English or French ports on the English Channel
- chaos theory — a theory, applied in various branches of science, that apparently random phenomena have underlying order
- chapter book — a children's book, typically a work of fiction, of moderate length and complexity, divided into chapters and intended for readers approximately seven to ten years old
- chapter room — a room for the use of the chapter of a religious institution
- chapter stop — any of several markers placed at intervals on a DVD film, enabling the viewer to find and select particular scenes
- chapterhouse — the building attached to a cathedral, collegiate church, or religious house in which the chapter meets
- charcoal rot — a disease of plants, especially sorghum, corn, etc., characterized by basal stem lesions and a black discoloration and dry rot of the internal tissues at the base of the stem and upper roots, caused by a fungus, Macrophomina phaseoli.
- charity shop — A charity shop is a shop that sells used goods cheaply and gives its profits to a charity.
- charity toss — a free shot given as a penalty for a foul
- charity work — unpaid work, usually fundraising, done in aid of a charity
- chart topper — a singer, band or video that comes top in the charts
- charterhouse — a Carthusian monastery
- chartophylax — an official who serves chiefly as the chancellor and archivist of a diocese.
- chatterboxes — Plural form of chatterbox.
- chemotherapy — Chemotherapy is the treatment of disease using chemicals. It is often used in treating cancer.
- chill factor — windchill factor
- chiropractic — Chiropractic is the treatment of injuries by pressing and moving people's joints, especially the spine.
- chiropractor — A chiropractor is a person who treats injuries by chiropractic.
- chiropterans — Plural form of chiropteran.
- chlorapatite — (mineral) A variety of apatite containing chloride instead of fluoride.
- chlorinating — Present participle of chlorinate.
- chlorination — Chemistry. to combine or treat with chlorine. to introduce chlorine atoms into an organic compound by an addition or substitution reaction.
- chloroacetic — an acid made by chlorinating acetic acid
- chloroethane — ethyl chloride.
- chloroplasts — Plural form of chloroplast.
- chocolatiers — Plural form of chocolatier.