13-letter words containing e, i, r
- ambidexterous — ambidextrous
- ambroise pare — Ambroise [ahn-brwaz] /ɑ̃ˈbrwaz/ (Show IPA), 1510–90, French surgeon.
- america's cup — an international yachting trophy, first won by the schooner America in 1851 and held as a challenge trophy by the New York Yacht Club until 1983
- american aloe — century plant
- american bond — a brickwork bond having a course of headers between five or six courses of stretchers.
- american curl — a breed of slender cat with curled-back ears and a plumed tail
- american fork — a town in central Utah.
- american plan — a hotel rate in which the charge includes meals
- american wake — an all-night farewell party for a person about to emigrate to America
- amicus curiae — a person not directly engaged in a case who advises the court
- aminotriazole — a white, crystalline, soluble powder, NHNC(NH2)NCH, used for killing weeds or other undesired vegetation: a carcinogen
- amitriptyline — a tricyclic antidepressant drug. Formula: C20H23N
- amitryptyline — a drug with several uses, most commonly prescribed to treat depression
- ammonia water — ammonia (def 2).
- amor asteroid — one of a small group of asteroids whose orbits approach but do not cross that of the earth: named after the first such asteroid discovered (1932).
- amphiprostyle — (esp of a classical temple) having a set of columns at both ends but not at the sides
- amphitheaters — Plural form of amphitheater.
- amphitheatral — relating to an amphitheatre, taking place in an amphitheatre
- amphitheatres — Plural form of amphitheatre.
- amphitheatric — Of, pertaining to, exhibited in, or resembling an amphitheatre.
- amphitrichate — having a single flagellum at each end.
- amphotericins — Plural form of amphotericin.
- anaerobically — (of an organism or tissue) living in the absence of air or free oxygen.
- anagrammatise — To produce an anagram of (a piece of text).
- anagrammatize — to arrange into an anagram
- anathematizer — One who anathematizes; a severe critic.
- ancien regime — The ancien regime was the political and social system in France before the revolution of 1789.
- ancient greek — the Greek language from the earliest records to about 300 bc, the chief dialect areas of which were Aeolic, Arcadic, Doric, and Ionic (including Attic)
- andersonville — town in SW central Ga.: site of a Confederate prison in the Civil War
- andrei markov — (person) 1856-1922. The Russian mathematician, after who Markov chains were named.
- androcentrism — centered on, emphasizing, or dominated by males or masculine interests: an androcentric society; an androcentric religion.
- androdioecism — the state of being androdioecious
- angela merici — Saint, 1474–1540, Italian ecclesiastic, founder of the Ursuline order.
- angelica tree — Hercules'-club
- angiokeratoma — a skin disease characterized by clusters of dilated blood vessels and by thickened skin, forming warty growths, especially on the scrotum, fingers, and toes.
- angiospermous — of or relating to an angiosperm; having enclosed seeds.
- angle grinder — a handheld power tool with a rotating abrasive disc, used for cutting, grinding and polishing
- animadversion — criticism or censure
- animadverting — Present participle of animadvert.
- animal warden — dogcatcher.
- anise camphor — anethole.
- anisometropia — an imbalance in the power of the two eyes to refract light
- anisometropic — relating to anisometropia
- anna christie — a play (1921) by Eugene O'Neill.
- anna karenina — a novel (1875–76) by Leo Tolstoy.
- anniversaries — Plural form of anniversary.
- anno hebraico — A.H.
- answerability — liable to be asked to give account; responsible: He is answerable to a committee for all his decisions.
- antarctictite — (mineral) A saline evaporite consisting of calcium chloride, CaCl.6H2O, found in Victoria Land, Antarctica.
- ante meridiem — before noon