12-letter words containing a, d, r, i
- antidiuretic — (of a hormone, treatment, etc) acting on the kidneys to control water excretion
- antihydrogen — hydrogen in which the nucleus is an antiproton with an orbiting positron
- antiperiodic — efficacious against recurring attacks of a disease
- antipredator — discouraging or protecting against predators
- antispinward — (often science fiction) In a rotating reference frame, against the direction of spin.
- aperiodicity — not periodic; irregular.
- aphrodisiacs — Plural form of aphrodisiac.
- apostle bird — a gregarious grey-and-brown Australian nest-building bird, Struthidea cinerea
- appendicular — relating to an appendage or appendicle
- applied arts — arts that are put to practical use
- apprehending — Present participle of apprehend.
- appropriated — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximated — near or approaching a certain state, condition, goal, or standard.
- aramid fiber — a fiber having resistance to high temperatures and great strength, formed from an aramid and used in materials for bulletproof vests and radial tires.
- 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)
- archdiocesan — Relating to an archdiocese.
- archdioceses — Plural form of archdiocese.
- archiannelid — (zoology) Any member of the Archiannelida.
- arctic daisy — a daisy, Chrysanthemum arcticum, of arctic regions, having asterlike heads of white or lilac flowers.
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- aria da capo — an operatic aria in three sections with the first and third sections alike and the middle section contrasting.
- arrival date — Your arrival date is the date that you are expected to come to a hotel or other location.
- arsenic acid — a white poisonous soluble crystalline solid used in the manufacture of arsenates and insecticides. Formula: H3AsO4
- arseniureted — combined with arsenic
- art director — a person responsible for the sets and costumes in a film
- arterialized — Simple past tense and past participle of arterialize.
- artiodactyle — (zoology) One of the Artiodactyla, a group of ungulates.
- artiodactyls — Plural form of artiodactyl.
- astrodynamic — Pertaining to astrodynamics.
- auctioneered — Simple past tense and past participle of auctioneer.
- auditorially — Anatomy, Physiology. pertaining to hearing, to the sense of hearing, or to the organs of hearing.
- autodiallers — Plural form of autodialler.
- award-winner — person or thing that wins an award
- axillary bud — a bud that is borne at the axil of a leaf and is capable of developing into a branch shoot or flower cluster.
- bacteria bed — a layer of sand or gravel used to expose sewage effluent, in its final stages, to air and the action of microorganisms
- bactericidal — any substance capable of killing bacteria.
- bactericides — Plural form of bactericide.
- bacteriocide — Alternative form of bactericide.
- bad hair day — People sometimes say they are having a bad hair day when they do not feel very happy or relaxed, especially because their hair does not look good.
- baker island — an island in the central Pacific near the equator, belonging to the U.S. 1 sq. mi. (2.6 sq. km).
- baldwin park — city in SW Calif.: suburb of Los Angeles: pop. 76,000
- bandaranaike — Chandrika
- banderillero — a bullfighter's assistant who sticks banderillas into the bull
- bandjarmasin — Banjarmasin
- bandjermasin — a seaport on the S coast of Borneo, in Indonesia.
- barium oxide — a white or yellowish-white poisonous heavy powder used esp as a dehydrating agent. Formula: BaO
- barking deer — muntjac.
- barley field — a piece of land cleared of trees and undergrowth, usually enclosed with a fence or hedge and used for growing barley
- barn dancing — the act of performing a progressive round country dance
- barodynamics — the branch of mechanics concerned with heavy structures