12-letter words containing a, s, u
- arsino group — the univalent group H 2 As−.
- arthur evans — Sir Arthur John, 1851–1941, English archaeologist.
- articulators — Plural form of articulator.
- arts council — an organization that provides funding for a variety of arts activities
- arts student — a person studying an arts subject
- as per usual — as usual
- ascomycetous — belonging or pertaining to the Ascomycota.
- ash-coloured — silver-grey in colour
- ashurbanipal — died ?626 bc, king of Assyria (?668–?626): son of Esarhaddon. He built the magnificent palace and library at Nineveh
- assassin bug — any long-legged predatory, often blood-sucking, insect of the heteropterous family Reduviidae
- assault boat — a portable boat used for landing troops on beaches and for crossing rivers.
- assaultively — in an assaultive manner
- assentaneous — having a tendency to agree, comply or acquiesce
- assimulating — Present participle of assimulate.
- assimulation — Obsolete form of assimilation.
- assuefaction — the condition of being or becoming familiar with or used to something
- assumability — a mortgage loan or a feature of such that allows the buyer of a property to assume or take on the existing mortgage from the property seller
- assumed bond — a bond issued by one corporation and assumed as an obligation by another.
- assumed name — If you do something under an assumed name, you do it using a name that is not your real name.
- assumptively — taken for granted.
- assurbanipal — Ashurbanipal
- astoundingly — capable of overwhelming with amazement; stunningly surprising.
- astronautics — the science and technology of space flight
- astrotourist — a person who pays to travel into space as a form of recreation
- astroturfing — a PR tactic used in politics and advertising in which actors are paid to display overt and apparently spontaneous grassroots support for a particular product, policy, or event
- asynchronous — An asynchronous electric machine is one in which the magnetic field and the rotation are not exactly the same.
- at all hours — If you say that something happens at all hours of the day or night, you disapprove of it happening at the time that it does or as often as it does.
- atheromatous — a sebaceous cyst.
- athos, mount — autonomous monastic district occupying the tip of the easternmost prong of the Chalcidice peninsula, NE Greece: 130 sq mi (337 sq km); pop. 1,500
- 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.
- attitudinous — (informal) Having a bold and possibly unfriendly attitude; sassy.
- attributions — Plural form of attribution.
- auction sale — an instance of items being sold by auction
- auction site — a commercial website on which items are sold by internet auction
- audio system — integrated equipment for producing amplified sound, as in a hi-fi or a mobile disco, or as a public-address system on stage
- audio-visual — Audio-visual equipment and materials involve both recorded sound and pictures.
- audiologists — Plural form of audiologist.
- audiovisuals — Plural form of audiovisual.
- auger shower — a shower of electrons, photons, etc. resulting from the collision of primary cosmic rays with atomic nuclei in the atmosphere
- aurene glass — an iridescent American art glass colored gold and blue.
- auscultating — Present participle of auscultate.
- 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.
- austenitized — to form austenite in (a ferrous alloy) by heating.
- austin friar — one of the Hermits of St. Augustine.
- australasian — Australasian means belonging or relating to Australasia or to its people.
- australopith — (archaeology, anthropology, paleonotology) Of or pertaining to the extinct hominid primates, of the genus Australopithecus, from the Pleistocene period.
- austronesian — of or relating to Austronesia, its peoples, or their languages
- autistically — in an autistic manner or the manner of a person who has autism
- auto-erotism — the arousal and satisfaction of sexual excitement within or by oneself, as by masturbation.