12-letter words containing a, e, r, o
- anemochorous — (of a fruit, seed, or spore) adapted for dispersion by wind.
- anemotropism — orientation in response to a current of air.
- angelo patri — Angelo [an-juh-loh] /ˈæn dʒəˌloʊ/ (Show IPA), 1877–1965, U.S. educator and writer, born in Italy.
- anglo-french — of or relating to England and France
- animal lover — a person who feels fondness for animals
- anisothermal — (thermodynamics) Of or pertaining to a system that is not in thermal equilibrium, that does not have a single fixed temperature.
- anisotropies — Plural form of anisotropy.
- anorexigenic — causing loss of appetite
- anorthoclase — a variety of microcline, rich in sodium and sometimes having a play of color: sometimes considered a variety of orthoclase.
- anotherguess — of a different type or kind; different
- ansate cross — ankh
- anteriorness — The state or quality of being anterior.
- antherozooid — Alternative form of antherozoid.
- anthologiser — Alternative spelling of anthologizer.
- anthologizer — an anthologist; a creator of an anthology
- anthropogeny — the genesis or development of the human race, especially as a subject of scientific study.
- anti-foreign — the policy or practice of showing hostility toward foreigners, foreign customs, etc.
- anti-strophe — the part of an ancient Greek choral ode answering a previous strophe, sung by the chorus when returning from left to right.
- antiandrogen — (steroid, pharmacology) Any substance that inhibits the release or the biological effects of an androgen.
- anticonsumer — opposed to consumerism
- antideuteron — the antimatter counterpart to the deuteron.
- antielectron — an elementary particle with a positive charge, a positron
- antientropic — showing a tendency towards order
- antiestrogen — any of several major female sex hormones produced primarily by the ovarian follicles of female mammals, capable of inducing estrus, developing and maintaining secondary female sex characteristics, and preparing the uterus for the reception of a fertilized egg: used, especially in synthetic form, as a component of oral contraceptives, in certain cancer treatments, and in other therapies.
- antigropelos — waterproof leggings used to protect against mud
- antihydrogen — hydrogen in which the nucleus is an antiproton with an orbiting positron
- antineutrino — the antiparticle of a neutrino; a particle having oppositely directed spin to a neutrino, that is, spin in the direction of its momentum
- antineutrons — Plural form of antineutron.
- antiperiodic — efficacious against recurring attacks of a disease
- antipredator — discouraging or protecting against predators
- antireformer — One who opposes reform.
- antireligion — opposed to religion
- antistrophes — Plural form of antistrophe.
- antitakeover — opposed to or acting against a takeover
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- aortic valve — a semilunar valve between the aorta and the left ventricle of the heart that prevents the blood from flowing back into the left ventricle.
- apeirophobia — The fear of infinity and/or of infinite things.
- aperiodicity — not periodic; irregular.
- 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.
- appeal court — An appeal court is the same as a Court of Appeal.
- apperception — the attainment of full awareness of a sensation or idea
- appleknocker — Northern U.S. a rustic.
- appreciation — Appreciation of something is the recognition and enjoyment of its good qualities.
- appreciators — to be grateful or thankful for: They appreciated his thoughtfulness.
- appreciatory — appreciative.
- apprehension — Apprehension is a feeling of fear that something bad may happen.
- appressorium — a flattened hypha of a parasitic fungus that penetrates the host tissues