12-letter words containing a, r, t, e, i, o
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- arctic ocean — the ocean surrounding the North Pole, north of the Arctic Circle. Area: about 14 100 000 sq km (5 440 000 sq miles)
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- aristophanes — ?448–?380 bc, Greek comic dramatist, who satirized leading contemporary figures such as Socrates and Euripides. Eleven of his plays are extant, including The Clouds, The Frogs, The Birds, and Lysistrata
- aristotelian — of or relating to Aristotle or his philosophy
- arpeggiation — the writing, playing or singing of arpeggios
- arsenopyrite — a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS
- art director — a person responsible for the sets and costumes in a film
- art mobilier — small, movable art objects, especially primitive or prehistoric works of art.
- arteriograms — Plural form of arteriogram.
- arteriopathy — Any disease of the arteries.
- arthrotomies — Plural form of arthrotomy.
- artiodactyle — (zoology) One of the Artiodactyla, a group of ungulates.
- aspect ratio — the ratio of width to height of the picture on a television or cinema screen
- assertations — Plural form of assertation.
- asseveration — the act of asseverating.
- astigmometer — an apparatus for measuring the degree of astigmatism.
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- atheoretical — having no connection with and not founded on theory
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
- atomic power — nuclear power.
- attorneyship — The office or profession of an attorney.
- au contraire — on the contrary
- auctioneered — Simple past tense and past participle of auctioneer.
- austronesian — of or relating to Austronesia, its peoples, or their languages
- authorizable — able to be authorized
- auto-erotism — the arousal and satisfaction of sexual excitement within or by oneself, as by masturbation.
- autocritique — the examination of factors guiding one's thoughts, beliefs and actions; self-criticism
- autodiallers — Plural form of autodialler.
- autoinjector — A medical device designed to deliver a single dose of a particular, typically life-saving, drug.
- autoreactive — (immunology, medicine) Acting against the organism by which it was produced.
- azathioprine — a synthetic drug that suppresses the normal immune responses of the body and is administered orally during and after organ transplantation and also in certain types of autoimmune disease. Formula: C9H7N7O2S
- 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
- balloon tire — a wide, deep-walled pneumatic tire with relatively low air pressure to lessen the shock of bumps
- barometrical — (archaic) Relating to, or observed with, a barometer, barometric.
- barquisimeto — a city in NW Venezuela. Pop: 1 009 000 (2005 est)
- below stairs — People sometimes use below stairs to refer to the servants in a rich household and the things that are connected with them.
- beta orionis — Rigel
- beta version — beta testing
- bicollateral — (of a vascular bundle) having two phloem groups to the inside and outside, respectively, of the xylem
- biometrician — a person who is knowledgeable about biometry
- bipropellant — a rocket propellant consisting of two substances, usually a fuel and an oxidizer
- bitter aloes — a bitter purgative drug made from the leaves of several species of aloe
- bletheration — nonsense!
- borosilicate — a salt of boric and silicic acids
- boulangerite — a bluish lead-gray mineral, lead antimony sulfide, Pb 5 Sb 4 S 11 , a minor ore of lead.
- brainstormer — a person who brainstorms