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20-letter words containing a, r, i, o

  • sodium meta-arsenite — sodium arsenite.
  • software engineering — the process of writing computer programs
  • solitary confinement — the confinement of a prisoner in a cell or other place in which he or she is completely isolated from others.
  • south american plate — a major tectonic division of the earth's crust, comprising the continent of South America and several ocean basins and bounded on the north by the Caribbean Plate, on the east by the Mid-Atlantic Ridge, on the west by a submarine trench that borders the western coast of the continent, and on the south by the Antarctic Plate.
  • south orkney islands — an uninhabited group of islands in the S Atlantic, southeast of Cape Horn: formerly a dependency of the Falkland Islands; part of the British Antarctic Territory since 1962 (claims are suspended under the Antarctic Treaty). Area: 621 sq km (240 sq miles)
  • southern oscillation — a low-latitude fluctuation of atmospheric pressure closely linked with El Niño events, specifically the periods of El Niño warming and La Niña cooling.
  • span of apprehension — the maximum number of objects that can be correctly assessed after a brief presentation
  • spanish oyster plant — a composite plant, Scolymus hispanicus, of southern Europe, having spiny, thistlelike leaf margins, small yellow flowers, and an edible root.
  • special boat service — a unit of the Royal Marines specializing in reconnaissance and sabotage
  • special patrol group — a former police unit tasked with counter terrorism in the Royal Ulster Constabulary
  • special relationship — the exceptionally close political, diplomatic, cultural and historical relations between the United States and the United Kingdom
  • specific performance — (especially in the sale of land) literal compliance with one's contractual promises pursuant to a judicial mandate.
  • spectroscopic binary — a binary star having components that are not sufficiently separated to be resolved by a telescope, known to be a binary only bythe variations in wavelength of emitted light that are detected by a spectroscope.
  • spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape.
  • spherical coordinate — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
  • spiral of archimedes — a curve that is the locus of a point that moves outward with uniform speed along a vector, beginning at the origin, while the vector rotates about the origin with uniform angular velocity. Equation (in polar coordinates): r = aθ.
  • spirits of hartshorn — a colorless, pungent, suffocating, aqueous solution of about 28.5 percent ammonia gas: used chiefly as a detergent, for removing stains and extracting certain vegetable coloring agents, and in the manufacture of ammonium salts.
  • spontaneous abortion — miscarriage (def 1).
  • spontaneous-abortion — Also called voluntary abortion. the removal of an embryo or fetus from the uterus in order to end a pregnancy.
  • spotted crane's-bill — the American wild geranium, Geranium maculatum.
  • square cross-section — If a kelly has a square cross-section, it has a surface area with four equal sides, when looked at as if has been sliced through.
  • square of opposition — a diagrammatic representation of the opposition of categorical propositions.
  • squatter sovereignty — (used contemptuously by its opponents) popular sovereignty (def 2).
  • state highway patrol — a state's road traffic police
  • step into the breach — If you step into the breach, you do a job or task which someone else was supposed to do or has done in the past, because they are suddenly unable to do it.
  • stochastic terrorism — the public demonization of a person or group resulting in the incitement of a violent act, which is statistically probable but whose specifics cannot be predicted: The lone-wolf attack was apparently influenced by the rhetoric of stochastic terrorism.
  • stoichiometric ratio — The stoichiometric ratio is the exact ratio between air and flammable gas or vapor at which complete combustion takes place.
  • straight as an arrow — direct, unwavering
  • straight-cut tobacco — tobacco that is cut in such a way that it will lie flat.
  • stress concentration — A stress concentration in a solid is a place where there is a lot of stress, either because a force is applied in a particular area or there is a change in the cross-sectional area.
  • structural isomerism — Chemistry. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism) as CH 3 OCH 3 and CH 3 CH 2 OH, or in the arrangement of their atoms in space and therefore in one or more properties. Compare optical isomerism, stereoisomerism.
  • subscription library — a commercial lending library
  • summary jurisdiction — the right a court has to adjudicate immediately upon some matter arising during its proceedings
  • supersonic transport — a commercial jet airplane that can fly faster than the speed of sound. Abbreviation: SST.
  • surveillance society — a society where surveillance technology is widely used to monitor people's everyday activities
  • switchboard operator — a person who operates an installation in a telephone exchange, office, hotel, etc, at which the interconnection of telephone lines is manually controlled
  • synchronized skating — the art or sport of teams of up to twenty skaters holding onto each other and moving in patterns in time to music
  • synchronous rotation — rotation of a satellite in which the period of rotation is equal to the period of orbit around its primary, leaving the same face always pointing toward the primary: The moon is in synchronous rotation about the earth.
  • system international — Système International d'Unités
  • systemic circulation — the circulatory system in general.
  • tactical air command — a U.S. Air Force command supplying direct air support to U.S. Army ground combat units.
  • teletype corporation — (company)   The company which made Teletype teletypewriters. Address: Skokie, Illinois, USA.
  • television broadcast — sth shown on tv
  • television programme — a programme broadcast on television
  • terms and conditions — commerce: rules, restrictions
  • tetrahydrocannabinol — a compound, C 21 H 30 O 2 , that is the physiologically active component in cannabis preparations (marijuana, hashish, etc.) derived from the Indian hemp plant or produced synthetically. Abbreviation: THC.
  • tetrahydrogestrinone — a synthetic anabolic steroid. Formula: C21H28O2
  • the founding fathers — any of the men who were members of the U.S. Constituional Convention of 1787
  • the internet account — An Internet provider in Sydney, Australia who provides SLIP, PPP and CLI accounts for the same rates. <[email protected]> handles Acorn software. E-mail: <[email protected]>. Telephone: +61 (2) 968 4333. Fax: +61 (2) 968 4334. Address: PO BOX 473, Crows Nest, NSE 2065, Australia.
  • the last word in sth — If you say that something is the last word in luxury, comfort, or some other quality, you are emphasizing that it has a great deal of this quality.
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