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20-letter words containing s, i, u, n

  • shifting cultivation — a land-use system, esp in tropical Africa, in which a tract of land is cultivated until its fertility diminishes, when it is abandoned until this is restored naturally
  • shoulder-length hair — hair that reaches a person's shoulders
  • sing for your supper — If someone has to sing for their supper, they have to do a job before they are allowed to do something they want to do.
  • size-weight illusion — a standard sense illusion that a small object is heavier than a large object of the same weight
  • slip through the net — If criminals slip through the net, they avoid being caught by the system or trap that was meant to catch them.
  • snow-on-the-mountain — a North American euphorbiaceous plant, Euphorbia marginata, having white-edged leaves and showy white bracts surrounding small flowers
  • sodium meta-arsenite — sodium arsenite.
  • soft gelatin capsule — A soft gelatin capsule is a type of capsule that is usually used to contain medicine in the form of liquid or powder, and which dissolves more quickly than a hard gelatin capsule.
  • sound motion picture — a motion picture with a soundtrack.
  • sound-and-light show — a nighttime spectacle or performance, at which a building, historic site, etc., is illuminated and the historic significance is imparted to spectators by means of narration, sound effects, and music.
  • 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 atlantic ocean — the part of the Atlantic Ocean extending S from the Equator to the Antarctic continent.
  • 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.
  • space-time continuum — Also called space-time continuum. the four-dimensional continuum, having three spatial coordinates and one temporal coordinate, in which all physical quantities may be located.
  • specific conductance — conductivity (def 2).
  • specific-conductance — conductivity (def 2).
  • spike someone's guns — a weapon consisting of a metal tube, with mechanical attachments, from which projectiles are shot by the force of an explosive; a piece of ordnance.
  • 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.
  • spuyten duyvil creek — a channel in New York City at the north end of Manhattan Island, connecting the Hudson and Harlem rivers.
  • 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).
  • squirrel's-foot fern — ball fern.
  • stick one's neck out — the part of the body of an animal or human being that connects the head and the trunk.
  • subjective intension — the associations that an expression has for an individual; the intension he believes it to have
  • subscription edition — an edition of one or more volumes for which a number of prospective purchasers place orders, usually in advance of publication.
  • subscription library — a commercial lending library
  • sufficient condition — a statement whose truth is sufficient to guarantee the truth of a given statement
  • suitland-silver hill — a city in central Maryland, near Washington, D.C.
  • summary jurisdiction — the right a court has to adjudicate immediately upon some matter arising during its proceedings
  • summative assessment — general assessment of a pupil's achievements over a range of subjects by means of a combined appraisal of formative assessments
  • sunday-go-to-meeting — most presentable; best: Sunday-go-to-meeting clothes.
  • superior conjunction — the alignment of an inferior planet and the sun in which the planet is at the far side of the sun from the earth.
  • supersonic transport — a commercial jet airplane that can fly faster than the speed of sound. Abbreviation: SST.
  • surface-active agent — any substance that when dissolved in water or an aqueous solution reduces its surface tension or the interfacial tension between it and another liquid.
  • surveillance society — a society where surveillance technology is widely used to monitor people's everyday activities
  • 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.
  • systemic circulation — the circulatory system in general.
  • systemic linguistics — a school of linguistics of British origin that emphasizes the social functions of language and describes grammar in terms of hierarchically organized structures and of systems of mutually exclusive choices available to the speaker under specified conditions.
  • telephone subscriber — a person who subscribes to a telephone service
  • terrestrial guidance — a method of missile or rocket guidance in which the flight path is controlled by reference to the strength and direction of the earth's gravitational or magnetic field
  • the founding fathers — any of the men who were members of the U.S. Constituional Convention of 1787
  • the garment industry — the manufacturing of items of clothing
  • the gnomes of zurich — Swiss bankers and financiers
  • the leisure industry — businesses such as cinemas, restaurants, sports facilities etc
  • the naughty nineties — (in Britain) the 1890s, considered to be a period of fun-loving and laxity, esp in sexual morals
  • the thousand guineas — an annual horse race, restricted to fillies, run at Newmarket since 1814
  • thioantimonious acid — any of a group of hypothetical acids, H3SbS3, HSbS2, and H4Sb2S5, known only in the forms of their salts in solution
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