12-letter words containing a, c, o, i
- astronomical — If you describe an amount, especially the cost of something as astronomical, you are emphasizing that it is very large indeed.
- astrophysics — Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
- asymptomatic — If someone with a disease is asymptomatic, it means that they do not show any symptoms of the disease.
- asymptotical — of or relating to an asymptote.
- asynchronies — a lack of synchronism or coincidence in time.
- asynchronism — a lack of synchronism; occurrence at different times
- atactostelic — Of or possessing an atactostele.
- atheological — having an aversion or resistance to theology
- atheoretical — having no connection with and not founded on theory
- athrocytosis — the capability of a cell to receive and store matter
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atomic clock — an extremely accurate clock in which an electrical oscillator is controlled by the natural vibrations of an atomic or molecular system such as caesium or ammonia
- atomic power — nuclear power.
- atychiphobia — (rare) The fear of failure.
- au contraire — on the contrary
- auction room — a room in a building where auctions take place
- auction sale — an instance of items being sold by auction
- auction site — a commercial website on which items are sold by internet auction
- auctioneered — Simple past tense and past participle of auctioneer.
- audiological — Of, or pertaining to, audiology, or the study of hearing.
- auscultation — the diagnostic technique in medicine of listening to the various internal sounds made by the body, usually with the aid of a stethoscope
- auspiciously — promising success; propitious; opportune; favorable: an auspicious occasion.
- autochthonic — pertaining to autochthons; aboriginal; indigenous (opposed to heterochthonous).
- autocratical — Autocratic.
- autocritique — the examination of factors guiding one's thoughts, beliefs and actions; self-criticism
- autodidactic — a person who has learned a subject without the benefit of a teacher or formal education; a self-taught person.
- autoeciously — in an autoecious manner
- autohypnotic — Of or pertaining to autohypnosis; self-hypnotizing.
- autoinjector — A medical device designed to deliver a single dose of a particular, typically life-saving, drug.
- automaticity — the condition of being automatic, or the degree of this
- autoptically — in an autoptical manner
- autoreactive — (immunology, medicine) Acting against the organism by which it was produced.
- autorhythmic — That generates its own rhythm.
- autorickshaw — (in India) a light three-wheeled vehicle driven by a motorcycle engine
- autotheistic — Self-worshiping; prideful in the extreme.
- avariciously — characterized by avarice; greedy; covetous.
- avitaminotic — of or relating to avitaminosis
- axiom schema — (logic) A formula in the language of an axiomatic system, containing one or more. These metasyntactic variables (or "schematic variables") that stand for terms or subformulae. An example is the Axiom of Comprehension.
- azithromycin — A macrolide antibiotic derived from erythromycin.
- bachelorship — the state of being a bachelor; bachelorhood
- back molding — a molding, as a backband, applied to interior window and door trim to conceal the edge of the wall surface.
- backcrossing — (genetics) The crossing of a hybrid with one of its parents or an individual genetically similar to its parent.
- backsolution — The process or result of backsolving.
- backstopping — a wall, wire screen, or the like, serving to prevent a ball from going too far beyond the normal playing area.
- bacon-slicer — a machine for cutting bacon into slices
- bacteriocide — Alternative form of bactericide.
- bacteriology — Bacteriology is the science and the study of bacteria.
- bacteriostat — any substance that arrests the growth or reproduction of bacteria but does not kill them
- balto-slavic — the Baltic and Slavic languages, when considered as constituting a subfamily within the Indo-European family of languages: the Baltic and Slavic branches are now generally considered by scholars as independently derived from Indo-European
- barcoo river — a river in E central Australia, in SW Queensland: joins with the Thomson River to form Cooper Creek