12-letter words containing a, e, r, u
- argillaceous — (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc
- armour plate — a tough heavy steel, usually containing chromium, nickel, and molybdenum and often hardened on the surface, used for protecting warships, tanks, etc
- armourbearer — One who carries armor for another.
- armoured car — a fast lightly armed and armoured vehicle, mainly used for reconnaissance
- arquebusiers — harquebusier.
- arseniferous — Lb geology Containing or producing arsenic.
- arseniureted — combined with arsenic
- arseno group — the bivalent group −As=As−.
- arthur evans — Sir Arthur John, 1851–1941, English archaeologist.
- articulately — uttered clearly in distinct syllables.
- articulative — relating to articulation
- arts student — a person studying an arts subject
- as per usual — as usual
- ash-coloured — silver-grey in colour
- at a premium — If something is at a premium, it is wanted or needed, but is difficult to get or achieve.
- at a venture — at random; by chance
- atheromatous — a sebaceous cyst.
- 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.
- attenborough — Sir David. born 1926, British naturalist and broadcaster; noted esp for his TV series Life on Earth (1978), The Living Planet (1983), The Life of Birds (1998), The Life of Mammals (2002), and First Life (2010)
- attributable — If something is attributable to an event, situation, or person, it is likely that it was caused by that event, situation or person.
- au contraire — on the contrary
- auctioneered — Simple past tense and past participle of auctioneer.
- auger effect — the spontaneous emission of an electron instead of a photon by an excited ion as a result of a vacancy being filled in an inner electron shell
- 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.
- auroral zone — the region surrounding the north or south geomagnetic pole in which the auroral phenomena take place.
- 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.
- autoanalyzer — any of various automatic devices that test and analyze chemicals, blood, etc.
- autochangers — Plural form of autochanger.
- autocritique — the examination of factors guiding one's thoughts, beliefs and actions; self-criticism
- autodestruct — likely to or possessing the power to destroy or obliterate itself or its possessor
- autodiallers — Plural form of autodialler.
- autoexposure — A device that sets the exposure automatically on a camera or other piece of equipment.
- 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.
- averruncator — a long pair of shears used for pruning the higher branches of trees
- axe-murderer — someone who commits murderer with an axe
- baby-bouncer — a seat on springs suspended from a door frame, etc, in which a baby may be placed for exercise
- baccalaurean — of a baccalaureate
- baccalauréat — (esp in France) a school-leaving examination that qualifies the successful candidates for entrance to university
- bach trumpet — a modern small three-valved trumpet for playing clarino passages in Bach's music
- backgrounded — Simple past tense and past participle of background.
- backgrounder — A backgrounder is a short article in a newspaper or magazine that provides background information about a particular subject.
- backpressure — a resistant pressure exerted by liquid or gas against the forward motion or flow of an exhaust or pipe system: Careful control of backpressure ensures an even supply of oil from the well.
- badger skunk — hog-nosed skunk (def 1).
- badger-skunk — Also called badger skunk, rooter skunk. a large, naked-muzzled skunk, Conepatus mesoleucus, common in the southwestern U.S. and Mexico, having a black coat with one broad white stripe down the back and tail.
- baluchithere — a hornless rhinoceros of the extinct genus Baluchitherium that inhabited central Asia during the Oligocene and early Miocene epochs: the largest land mammal known.
- banbury cake — a cake consisting of a pastry base filled with currants, raisins, candied peel, and sugar, with a crisscross pattern on the top