12-letter words starting with an
- antithrombin — a substance that counteracts the action of thrombin, preventing the formation of blood clots
- antitumoural — acting against or upon tumours
- antitussives — Plural form of antitussive.
- antiviolence — opposed to or acting against violence in society
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- antoninianus — an ancient Roman coin made either of silver or bronze and equal in value to two denarii
- antwerp blue — any of several iron-blue pigments, usually containing a considerable amount of extender.
- anuradhapura — a town in Sri Lanka: ancient capital of Ceylon; site of the sacred bo tree and place of pilgrimage for Buddhists. Pop: 53 151 (2001)
- anuszkiewicz — Richard Joseph, born 1930, U.S. op-art painter.
- anxious seat — a bench near the preacher at revival meetings, for those with a troubled conscience who seek salvation
- anything but — You use anything but in expressions such as anything but quiet and anything but attractive to emphasize that something is not the case.
- anzus treaty — Australia, New Zealand, and the United States, especially as associated in the mutual defense treaty (ANZUS Pact or ANZUS Treaty) of 1952.