12-letter words containing a, r, i, s
- arctic daisy — a daisy, Chrysanthemum arcticum, of arctic regions, having asterlike heads of white or lilac flowers.
- arctophilist — a collector of teddy bears
- arenaviruses — Plural form of arenavirus.
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- argillaceous — (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc
- ariel sharon — Ariel, 1928–2014, Israeli military and political leader; prime minister 2001–06.
- aristocratic — Aristocratic means belonging to or typical of the aristocracy.
- aristolochia — any of various plants of the genus Aristolochia of the family Aristolochiaceae
- 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
- aristophanic — 448?–385? b.c, Athenian comic dramatist.
- aristotelian — of or relating to Aristotle or his philosophy
- arm-twisting — persuasion
- arming chest — a chest for holding armor and weapons.
- arousability — to stimulate sexually.
- arquebusiers — harquebusier.
- arraignments — Plural form of arraignment.
- arsenic acid — a white poisonous soluble crystalline solid used in the manufacture of arsenates and insecticides. Formula: H3AsO4
- arseniferous — Lb geology Containing or producing arsenic.
- arseniureted — combined with arsenic
- 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
- arsino group — the univalent group H 2 As−.
- arsphenamine — a drug containing arsenic, formerly used in the treatment of syphilis and related infections
- artaxerxes i — died 425 bc, king of Persia (465–425): son of Xerxes I
- arteriograms — Plural form of arteriogram.
- arthroscopic — the use of an arthroscope to diagnose an injury to or disease of a joint or to perform minor surgery on a joint.
- arthrotomies — Plural form of arthrotomy.
- articulators — Plural form of articulator.
- artillerists — Plural form of artillerist.
- artiodactyls — Plural form of artiodactyl.
- artistically — conforming to the standards of art; satisfying aesthetic requirements: artistic productions.
- arts council — an organization that provides funding for a variety of arts activities
- ascertaining — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- ashurbanipal — died ?626 bc, king of Assyria (?668–?626): son of Esarhaddon. He built the magnificent palace and library at Nineveh
- asking price — The asking price of something is the price which the person selling it says that they want for it, although they may accept less.
- asparaginase — an enzyme used in treating leukaemia
- aspect ratio — the ratio of width to height of the picture on a television or cinema screen
- aspirational — If you describe someone as aspirational, you mean that they have strong hopes of moving to a higher social status.
- aspiringness — the condition of being aspiring
- assassinator — a person who assassinates
- assertations — Plural form of assertation.
- assessorship — the occupation, post or duties of a person who assesses, advises, or estimates
- asseverating — Present participle of asseverate.
- asseveration — the act of asseverating.
- asseverative — characterized by or relating to solemn declaration or affirmation
- assimilators — Plural form of assimilator.
- assimilatory — characterized by assimilation; assimilating.
- assurbanipal — Ashurbanipal
- asteriskless — having no asterisk
- astigmatizer — a cylindrical lens used in a rangefinder to draw out the point image of a point source into a line.
- astigmometer — an apparatus for measuring the degree of astigmatism.