12-letter words containing a, r, i, s
- antimacassar — a cloth covering the back and arms of chairs, etc, to prevent soiling or as decoration
- antineutrons — Plural form of antineutron.
- antiphrastic — relating to antiphrasis
- antipleasure — opposed to pleasure
- antipyretics — Plural form of antipyretic.
- antiquarians — Plural form of antiquarian.
- antiroyalism — Opposition to royals or royalism.
- antiroyalist — opposed to the monarchy
- antirrhinums — Plural form of antirrhinum.
- antispinward — (often science fiction) In a rotating reference frame, against the direction of spin.
- antistrophes — Plural form of antistrophe.
- antistrophic — Of or pertaining to an antistrophe.
- antistrophon — an argument that is retorted against an opponent
- antisway bar — stabilizer bar.
- antisymmetry — the correspondence in size, form, and arrangement of parts on opposite sides of a plane, line, or point; regularity of form or arrangement in terms of like, reciprocal, or corresponding parts.
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- aphoristical — Alternative form of aphoristic.
- aphrodisiacs — Plural form of aphrodisiac.
- apiculturist — beekeeping, especially on a commercial scale for the sale of honey.
- apostle bird — a gregarious grey-and-brown Australian nest-building bird, Struthidea cinerea
- apostrophise — to address by apostrophe.
- apostrophize — to address an apostrophe to
- apothecaries — Plural form of apothecary.
- apparatchiks — a member of an apparat, especially in a Communist country.
- applied arts — arts that are put to practical use
- appraisement — the act of estimating or judging the nature or value of something or someone.
- appraisingly — to estimate the monetary value of; determine the worth of; assess: We had an expert appraise the house before we bought it.
- appreciators — to be grateful or thankful for: They appreciated his thoughtfulness.
- apprehension — Apprehension is a feeling of fear that something bad may happen.
- apprehensive — Someone who is apprehensive is afraid that something bad may happen.
- apprentisage — Obsolete form of apprenticeage.
- appressorium — a flattened hypha of a parasitic fungus that penetrates the host tissues
- approbations — approval; commendation.
- appropriates — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximates — near or approaching a certain state, condition, goal, or standard.
- apron string — a string for tying an apron on
- aran islands — a group of three islands in the Atlantic, off the W coast of the Republic of Ireland: Aranmore or Inishmore (the largest), Inishmaan, and Inisheer. Pop: 1280 (2002). Area: 46 sq km (18 sq miles)
- arbitrageurs — Plural form of arbitrageur.
- arbitrations — Plural form of arbitration.
- archdiocesan — Relating to an archdiocese.
- archdioceses — Plural form of archdiocese.
- archeologist — archaeology.
- archerfishes — Plural form of archerfish.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- archiblastic — of, relating to, or derived from an archiblast.
- archipelagos — Plural form of archipelago.
- archive site — (networking) (Or "FTP site", "FTP archive") An Internet host where program source, documents, e-mail or news messages are stored for public access via anonymous FTP, Gopher, web or other document distribution system. There may be several archive sites (mirrors) for, e.g., a Usenet newsgroup though one may be recognised as the main one. FTP servers were common on the Internet for about ten years but have been largely replaced by web servers since the invention of the World-Wide Web and its HTTP protocol. Some well-known archive sites included Imperial College, UK, UUNET, USA, GNU archive site. The archie service attempted to index the contents of FTP archives, foreshadowing the indexing of the web by Google and others.
- archosaurian — belonging to or characteristic of the archosaurs