13-letter words containing a, c, o, u
- anachronously — in an anachronous manner
- anencephalous — congenital absence of part or all of the brain.
- anfractuosity — the condition or quality of being anfractuous
- announcements — Plural form of announcement.
- annular clock — a clock in the form of a vase, ball, etc., having the hours painted on a ring rotating beneath a pointer.
- annunciations — Plural form of annunciation.
- anticlinorium — a vast elongated anticline with its strata further folded into anticlines and synclines
- anticoagulant — acting to prevent or impair coagulation, esp of blood
- anticommunism — the opposition to communism
- anticommunist — (initial capital letter) a member of the Communist Party or movement.
- antiochus iii — known as Antiochus the Great. 242–187 bc, king of Syria (223–187), who greatly extended the Seleucid empire but was forced (190) to surrender most of Asia Minor to the Romans
- antiscorbutic — preventing or curing scurvy
- antisudorific — an antiperspirant.
- appeals court — An appeals court is the same as an appellate court.
- arachnivorous — Spider-eating.
- arboriculture — the cultivation of trees or shrubs, esp for the production of timber
- archeptolemus — (in the Iliad) the son of Iphitus who served as a charioteer for Hector.
- arsenous acid — a toxic white powder, As2O3, used to make other arsenic compounds, insecticides, and preservatives; white arsenic
- articulations — Plural form of articulation.
- arundinaceous — resembling a reed
- asset account — An asset account is an account that records the assets owned by a company.
- astronautical — of or relating to astronautics or astronauts.
- at a discount — below the regular price
- atomic number — the number of protons in the nucleus of an atom of an element
- atomic volume — the atomic weight (relative atomic mass) of an element divided by its density
- atroceruleous — a deep blue-black color.
- atrociousness — The state of being atrocious.
- auction block — Also called block. a platform from which an auctioneer sells: the old courthouse where slaves were sold from the auction block.
- auction house — a commercial company that specializes in selling items at auction
- auction pitch — a variety of all fours in which players bid to determine the trump or pitch.
- auctioneering — Present participle of auctioneer.
- audaciousness — Risky or daring behaviour.
- audience room — a room for holding formal interviews or hearings.
- audiocassette — a cassette containing audiotape
- audiographics — audiographic teleconferencing
- auguste comte — (Isidore) Auguste (Marie François) [ee-zee-dawr oh-gyst ma-ree frahn-swa] /i ziˈdɔr oʊˈgüst maˈri frɑ̃ˈswa/ (Show IPA), 1798–1857, French founder of the philosophical system of positivism.
- aulic council — a council, founded in 1498, of the Holy Roman Emperor. It functioned mainly as a judicial body
- austroasiatic — a family of languages spoken in SE Asia and the landsaround the Bay of Bengal and consisting principally of Vietnamese, Khmer, Mon, Khasi, Nicobarese, and the Munda languages.
- autapomorphic — (biology) Describing any characteristic that has evolved in only a single species (or other taxon).
- authenticator — a person or thing that authenticates.
- auto-destruct — self-destruct.
- auto-injector — An auto-injector is a hypodermic syringe that you can use to inject yourself with a liquid.
- autocatalyses — Third-person singular simple present indicative form of autocatalyse.
- autocatalysis — the catalysis of a reaction in which the catalyst is one of the products of the reaction
- autocatalytic — causing its own chemical reaction
- autocatharsis — a therapeutic process designed to free unconscious disturbances by having the patient write about his or her experiences, impressions, etc.
- autocephalous — (of an Eastern Christian Church) governed by its own national synods and appointing its own patriarchs or prelates
- autochthonous — (of rocks, deposits, etc) found where they and their constituents were formed
- autodidactism — Alternative form of autodidacticism.
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation