18-letter words containing a, e, r, i, l
- (go) off the rails — (to go) off the proper course
- a leap in the dark — an action performed without knowledge of the consequences
- acadian flycatcher — a small, greenish tyrant flycatcher (Empidonax virescens) found in deciduous forests of E North America
- according to hoyle — according to the rules and regulations; in the prescribed, fair, or correct way
- account receivable — a current asset account showing amounts payable to a firm by customers who have made purchases of goods and services on credit
- acorn online media — (company) A company formed in August 1994 by Acorn Computer Group plc to exploit the ARM RISC in television set-top box decoders. They planned to woo British Telecommunications plc to use the box in some of its video on demand trials. The "STB1" box was based on an ARM8 core with additional circuits to enable MPEG to be decoded in software - possibly dedicated instructions for interpolation, inverse DCT or Huffman table extraction. A prototype featured audio MPEG chips, Acorn's RISC OS operating system and supported Oracle Media Objects and Microword. Online planned to reduce component count by transferring functions from boards into the single RISC chip. The company was origianlly wholly owned by Acorn but was expected to bring in external investment. In 1996 they releasd the imaginatively titled "Set Top Box 2" (STB20M) with a 32 MHz ARM 7500 and 2 to 32 MB RAM. There was also a "Set Top Box 22".
- activated charcoal — a form of carbon having very fine pores: used chiefly for adsorbing gases or solutes, as in various filter systems for purification, deodorization, and decolorization.
- address resolution — (networking) Conversion of an Internet address into the corresponding physical address (Ethernet address). This is usually done using Address Resolution Protocol. The resolver is a library routine and a set of processes which converts hostnames into Internet addresses, though this process in not usually referred to as resolution. See DNS.
- administrative law — law relating to the control of government power
- admirable crichton — a comedy (1902) by Sir James M. Barrie.
- aerial perspective — a means of indicating relative distance in terms of a gradation of clarity, tone, and colour, esp blue
- aerial photography — Aerial photography is the process of taking photographs of an area from above, for example from an airplane or mast.
- aeronautical chart — a topographic map of an area of the earth's surface, designed as an aid to aircraft navigation
- african tulip tree — a tropical African evergreen tree, Spathodea campaulata, with pinnate leaves, split pods, winged seeds, and large red flowers.
- african yellowwood — a tree, Podocarpus elongatus, of tropical Africa and the mountains of southern Africa, having globe-shaped fruit, grown as an ornamental.
- agri-environmental — of or relating to the impact of agricultural practices on the environment
- agricultural agent — county agent.
- agro-industrialize — to industrialize the agriculture of: to agro-industrialize a developing nation.
- aids-related virus — a variant of the AIDS virus. Abbreviation: ARV.
- 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
- albert bruce sabin — Albert Bruce, 1906–93, U.S. physician, born in Poland: developed Sabin vaccine.
- albrecht waldstein — Albrecht von [German ahl-brekht fuh n] /German ˈɑl brɛxt fən/ (Show IPA), Wallenstein, Albrecht Wenzel Eusebius von.
- 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.
- alexander i island — an island of Antarctica, west of Palmer Land, in the Bellingshausen Sea. Length: about 378 km (235 miles)
- 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.
- alternate straight — a hand consisting of five cards following one another by two in order of denomination, as a five, seven, nine, jack, and king, being of special value in certain games.
- alternating series — a series, usually infinite, in which successive terms have opposite signs, as 1 − ½ + ¼ − ⅛ +. ….
- 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 energy — a form of energy derived from a natural source, such as the sun, wind, tides, or waves
- 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.
- alumina trihydrate — a crystalline, water-insoluble powder, Al(OH) 3 or Al 2 O 3 ⋅3H 2 O, obtained chiefly from bauxite: used in the manufacture of glass, ceramics, and printing inks, in dyeing, and in medicine as an antacid and in the treatment of ulcers.
- 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 civil war — the war in the U.S. between the North and the South, 1861–65.
- 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
- analytical reagent — a chemical compound of a known high standard of purity
- andorre la vieille — French name for the capital of Andorra, situated in the west of the principality. Pop: 22 035 (2003 est)
- andrew file system — (operating system, storage) (AFS) The distributed file system of the Andrew Project, adopted by the OSF as part of their Distributed Computing Environment.
- 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.
- anti-commercialism — the principles, practices, and spirit of commerce.
- anti-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
- anticholinesterase — any of a group of substances that inhibit the action of cholinesterase
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