17-letter words containing a, c, o, s
- castor and pollux — the twin sons of Leda: Pollux was fathered by Zeus, Castor by the mortal Tyndareus. After Castor's death, Pollux spent half his days with his half-brother in Hades and half with the gods in Olympus
- cat-o'-nine-tails — a rope whip consisting of nine knotted thongs, used formerly to flog prisoners
- catastrophization — The act or process of catastrophizing.
- catch one's death — to contract a severe cold
- catcher resonator — See under Klystron.
- catholic epistles — the epistles of James, I and II Peter, I John, and Jude, which were addressed to the universal Church rather than to an individual or a particular church
- causality paradox — the hypothetical cause-and-effect of time travel and making changes in the past that would affect current actions.
- celestial equator — the great circle lying on the celestial sphere, the plane of which is perpendicular to the line joining the north and south celestial poles
- celestial horizon — the line or circle that forms the apparent boundary between earth and sky.
- cellulose acetate — nonflammable material made by acetylating cellulose: used in the manufacture of film, dopes, lacquers, and artificial fibres
- cellulose nitrate — a compound made by treating cellulose with nitric and sulphuric acids, used in plastics, lacquers, and explosives: a nitrogen-containing ester of cellulose
- cellulose varnish — a varnish made from cellulose nitrate, used as a protective sealing film
- centi-call second — (spelling) No, it's centum call second.
- chacun a son gout — each to his own taste
- châlons-sur-marne — city in NE France, on the Marne River: scene of defeat ( a.d. 451) of Attila by the Romans: pop. 50,000
- chamber orchestra — A chamber orchestra is a small orchestra which plays classical music.
- chancery division — (in England) the Lord Chancellor's court, now a division of the High Court of Justice
- change one's mind — to alter one's decision or opinion
- change one's tune — to alter one's attitude or tone of speech
- chanson de roland — English The Song of Roland. a chanson de geste (c1100) relating Roland's brave deeds and death at Roncesvalles and Charlemagne's revenge.
- characterisations — Plural form of characterisation.
- characterizations — portrayal; description: the actor's characterization of a politician.
- charles henry dow — Charles Henry, 1851–1902, U.S. journalist and publisher: a founder of Dow Jones company.
- charles townshend — Charles, 1725–67, English politician, chancellor of the exchequer for whom the Townshend Acts are named.
- chart of accounts — A chart of accounts is a list of all the accounts used in a business to classify transactions or report balances.
- charter of rights — a section of the Canadian Constitution containing a statement of the basic rights of citizens of Canada.
- chartered society — a society that has an official charter
- checkable deposit — a checking account
- chelsea pensioner — an old ex-soldier resident in the Chelsea Royal Hospital
- chemotherapeutics — chemotherapy.
- china grass cloth — grass cloth.
- chinese artichoke — a hairy plant, Stachys affinis, of China and Japan, having numerous small, white, edible tubers.
- choanoflagellates — Plural form of choanoflagellate.
- chocolate biscuit — a biscuit covered with chocolate
- chocolate soldier — a person who mistakenly believes that he or she is very powerful, important, or impressive
- chromolithographs — Plural form of chromolithograph.
- chugach mountains — a coastal mountain range in S Alaska, extending W from the St. Elias Mountains. Highest peak, Mount Marcus Baker, 13,176 feet (4016 meters).
- cinisello balsamo — a city in N Italy, near Milan.
- circle the wagons — to take defensive action; prepare for an attack: from arranging a wagon train in a circular formation
- cistern barometer — a mercury barometer in which the lower mercury surface has a greater area than the upper.
- clang association — the association made between two words because they sound similar; for example cling and ring
- class distinction — a characteristic that is observed to differ based on social class
- classical college — (in Quebec) a college offering a programme that emphasizes the classics and leads to university entrance
- classless society — a society in which class distinctions are negligible or absent
- clear box testing — white box testing
- clicks and mortar — making use of traditional trading methods in conjunction with internet trading
- clicks-and-mortar — pertaining to or denoting a company that does business on the Internet and in traditional stores or offices.
- clipperton island — an uninhabited atoll in the E Pacific SW of Mexico, under French administration. Area: 6 sq km (2.3 sq miles)
- close corporation — a small private limited company
- close parenthesis — right parenthesis