12-letter words containing u, a
- alphanumeric — (of a character set, code, or file of data) consisting of alphabetical and numerical symbols
- alphaviruses — Plural form of alphavirus.
- altiloquence — Pompous language; lofty speech.
- altitudinous — pertaining to altitude or height
- alto-stratus — a cloud of a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus: of medium altitude, about 8000–20,000 feet (2450–6100 meters).
- amateurishly — In an amateurish or nonprofessional manner.
- ambartsumian — Viktor A(mazaspovich). 1908–96, Armenian astrophysicist, renowned for his description of radio sources as explosions in the core of galaxies
- ambidextrous — Someone who is ambidextrous can use both their right hand and their left hand equally skilfully.
- ambisextrous — Informal. sexually attracted to both sexes; bisexual. used by or suitable for either sex; unisex: ambisextrous hair styles.
- ambulanceman — An ambulanceman is a man who drives an ambulance or takes care of people in an ambulance on the way to hospital.
- ambulatories — Plural form of ambulatory.
- ambulatorily — By or in terms of walking.
- amentiferous — bearing aments
- amfebutamone — (former name) The drug bupropion.
- aminobutyric — (organic chemistry) Of or pertaining to any of several isomeric univalent radicals in which a hydrogen atom of a butyric radical is replaced by an amino group.
- ammonium ion — the ion NH4+, formed from ammonia and present in aqueous solutions of ammonia and in many salts
- amour-propre — self-respect
- amourousness — Rare spelling of amorousness.
- amphibiously — In the manner of an amphibian.
- amphicarpous — producing two kinds of fruit that differ either in form or in time of ripening.
- amphicoelous — (of the vertebrae of most fishes and some amphibians) concave at the anterior and posterior ends
- amphiregulin — (protein) A particular autocrine growth factor.
- amphistomous — (of certain animals, such as leeches) having a sucker at either end of the body
- amphithecium — the outer layer of cells of the sporophyte of mosses and liverworts that develops into the outer parts of the spore-bearing capsule
- amphitropous — (of a plant ovule) partially inverted so that the base and the micropyle at the apex are the same distance from the funicle
- ampullaceous — shaped like an ampulla or a bladder
- amundsen sea — a part of the South Pacific Ocean, in Antarctica off Byrd Land
- amuse-bouche — an appetizer before a meal
- amuse-gueule — amuse-bouche.
- amyl sulfide — a yellow liquid consisting of a mixture of isomers having the formula (C 5 H 11) 2 S, used chiefly in the preparation of organic sulfur compounds.
- anacolouthon — Alternative spelling of anacoluthon (A break in sequence, that occurs when the scheme of a sentence is changed in its course. Incoherence in a sentence.).
- anacrogynous — having the female sex organs arising from any cell below the apex of the stem, thereby not terminating its growth, as certain liverworts.
- anastasius i — a.d. c430–518, emperor of the Eastern Roman Empire 491–518.
- and counting — If you say and counting after a number or an amount of something, you mean that the number or amount is continuing to increase.
- andouillette — a French sausage made from pig intestines, smaller than an andouille
- andre fleury — André Hercule de [ahn-drey er-kyl duh] /ɑ̃ˈdreɪ ɛrˈkül də/ (Show IPA), 1653–1743, French cardinal and statesman.
- androclinium — clinandrium.
- anemochorous — (of a fruit, seed, or spore) adapted for dispersion by wind.
- anemophilous — (of flowering plants such as grasses) pollinated by the wind
- aneurysmatic — (medicine) Describing a blood vessel that has an aneurysm; aneurysmal.
- angiocarpous — being or having fruit contained in a vessel such as a shell
- angiostomous — having a narrow opening
- angra mainyu — the evil spirit who contends against Spenta Mainyu.
- anguilliform — having the shape or form of an eel
- angularities — Plural form of angularity.
- animalculism — the theory explaining psychological and pathological phenomena through animalcules
- animalculist — a person who subscribes to the theory of animalculism
- animalculous — a minute or microscopic animal, nearly or quite invisible to the naked eye, as an infusorian or rotifer.
- ankylosaurus — a plant-eating dinosaur of the Cretaceous period that had a tail resembling a club and a body covering of thick scales
- announceable — to make known publicly or officially; proclaim; give notice of: to announce a special sale.