18-letter words containing a, e, o
- african yellowwood — a tree, Podocarpus elongatus, of tropical Africa and the mountains of southern Africa, having globe-shaped fruit, grown as an ornamental.
- agammaglobulinemia — a condition of the blood, either congenital or acquired, in which there is near or complete absence of gamma globulin and a failure of the body to form antibodies, resulting in a frequent occurrence of infectious disease.
- age discrimination — discrimination against older people, especially by employers
- aggravated robbery — a robbery made more serious by its violent circumstances
- agri-environmental — of or relating to the impact of agricultural practices on the environment
- agro-industrialize — to industrialize the agriculture of: to agro-industrialize a developing nation.
- ahead of the curve — People, products or ideas that are ahead of the curve are more advanced or modern than others of their kind.
- ahead of your time — If someone is ahead of their time or before their time, they have new ideas a long time before other people start to think in the same way.
- air-to-air missile — a missile fired from an aircraft that targets other aircraft in flight
- air-to-sea missile — a missile fired from an aircraft that has a target on the sea
- airspeed indicator — a dial that indicates the airspeed at which an aircraft is travelling
- alcohol dependence — alcoholism.
- alexander hamilton — Alexander, 1757–1804, American statesman and writer on government: the first Secretary of the Treasury 1789–97; mortally wounded by Aaron Burr in a duel.
- alexius i comnenus — 1048–1118, ruler of the Byzantine Empire (1081–1118)
- algebraic equation — an equation in the form of a polynomial having a finite number of terms and equated to zero, as 2 x 3 + 4 x 2 − x + 7 = 0.
- algebraic function — any function which can be constructed in a finite number of steps from the elementary operations and the inverses of any function already constructed
- algebraic geometry — the study of sets that are defined by algebraic equations.
- algebraic notation — the standard method of denoting the squares on the chessboard, by allotting a letter, a, b, c, up to h, to each of the files running up the board from White's side, starting from the left, and a number to each of the ranks across the board, starting with White's first rank
- algebraic topology — the branch of mathematics that deals with the application of algebraic methods to topology, especially the study of homology and homotopy.
- alkali metaprotein — a metaprotein derived by means of a hydrolytic alkali.
- all along the line — at every stage in a series
- all over the place — If something is happening all over the place, it is happening in many different places.
- all the better for — improved as a result of
- all the same to me — If you say 'It's all the same to me', you mean that you do not care which of several things happens or is chosen.
- almoner's cupboard — a cupboard with pierced doors, formerly used as a storage place for food.
- along the lines of — similar to
- alternative comedy — a style of comedy originating in the UK in the 1980s that seeks to avoid racist or sexist stereotypes, and usually puts forward left-wing, anti-establishment views
- alternative school — any public or private school having a special curriculum, especially an elementary or secondary school offering a more flexible program of study than a traditional school.
- aluminum hydroxide — a white powder, Al(OH)3, obtained from bauxite and used to make glass, paper, etc. and in antacids
- american brooklime — any of various speedwells found along brooks, in marshes, etc., as Veronica americana (American brooklime) a creeping plant having leafy stems and loose clusters of small blue flowers.
- american chameleon — anole: lizards of this type (family Iguanidae) are incorrectly called “chameleons”
- american cockroach — a large, reddish-brown cockroach, Periplaneta americana, found originally in the southern U.S. but now widely distributed.
- ammonium carbamate — a white soluble crystalline compound produced by reaction between dry ammonia and carbon dioxide and used as a nitrogen fertilizer. Formula: (NH4)CO2NH2
- ammonium carbonate — an unstable pungent soluble white powder that is a double salt of ammonium bicarbonate and ammonium carbamate: used in the manufacture of baking powder, smelling salts, and ammonium compounds. Formula: (NH4)HCO3.(NH4)CO2NH2
- ammonium hydroxide — a compound existing only in aqueous solution, formed when ammonia dissolves in water to form ammonium ions and hydroxide ions. Formula: NH4OH
- ammonium phosphate — monoammonium phosphate.
- ammonium purpurate — murexide.
- an overgrown child — an adult whose behaviour is characteristic of a child
- analogue recording — a sound recording process in which an audio input is converted into an analogous electrical waveform
- andorre la vieille — French name for the capital of Andorra, situated in the west of the principality. Pop: 22 035 (2003 est)
- angel of the north — a steel sculpture of an angel with outstretched wings, created in 1998 by British sculptor Antony Gormley, which stands on a hilltop outside Gateshead, NE England. It stands 20 m (85 ft) high and has a wingspan of 54 m (175 ft)
- angiotensinogenase — (enzyme) renin.
- angle of deviation — the angle between the direction of the refracted ray and the direction of the incident ray when a ray of light passes from one medium to another
- angle of elevation — elevation (def 8a).
- angle of incidence — the angle that a line or beam of radiation makes with the normal to the surface at the point of incidence
- angular dispersion — a measure of the angular separation of light rays of different wavelength or color traversing a prism or diffraction grating, equal to the rate of change of the angle of deviation with respect to the change in wavelength.
- anterior pituitary — a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region ((anterior pituitary) or (adenohypophysis)) that develops embryonically from the roof of the mouth and that secretes growth hormone, LH, FSH, ACTH, TSH, and MSH, a posterior region ((posterior pituitary) or (neurohypophysis)) that develops from the back of the forebrain and that secretes the hormones vasopressin and oxytocin, and an intermediate part (pars intermedia) derived from the anterior region but joined to the posterior region, that secretes the hormone MSH in lower vertebrates.
- anthropocentricity — the state or quality of being anthropocentric.
- anti-commercialism — the principles, practices, and spirit of commerce.
- anti-miscegenation — marriage or cohabitation between two people from different racial groups, especially, in the U.S., between a black person and a white person: In 1968 the Supreme Court ruled unanimously that state laws prohibiting miscegenation were unconstitutional.