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15-letter words containing d, i, s, u, l

  • silver quandong — an Australian tree, Elaeocarpus grandis: family Elaeocarpaceae
  • simple pendulum — a hypothetical apparatus consisting of a point mass suspended from a weightless, frictionless thread whose length is constant, the motion of the body about the string being periodic and, if the angle of deviation from the original equilibrium position is small, representing simple harmonic motion (distinguished from physical pendulum).
  • sled cultivator — go-devil (def 5).
  • sliver building — a very narrow skyscraper designed in response to restriction of the building site or zoning, frequently containing only a single apartment per floor or comparably limited office space.
  • snubfin dolphin — Australian dolphin with a small dorsal fin
  • sodium chlorate — a colorless, water-soluble solid, NaClO 3 , cool and salty to the taste, used chiefly in the manufacture of explosives and matches, as a textile mordant, and as an oxidizing and bleaching agent.
  • sodium chloride — salt1 (def 1).
  • sodium ethylate — a white, hygroscopic powder, C 2 H 5 ONa, that is decomposed by water into sodium hydroxide and alcohol: used chiefly in organic synthesis.
  • sodium fluoride — a colorless, crystalline, water-soluble, poisonous solid, NaF, used chiefly in the fluoridation of water, as an insecticide, and as a rodenticide.
  • sodium silicate — a substance having the general formula, Na2O.xSiO2, where x varies between 3 and 5, existing as an amorphous powder or present in a usually viscous aqueous solution
  • sodium sulphate — a solid white substance that occurs naturally as thenardite and is usually used as the white anhydrous compound (salt cake) or the white crystalline decahydrate (Glauber's salt) in making glass, detergents, and pulp. Formula: Na2SO4
  • soul-destroying — Activities or situations that are soul-destroying make you depressed, because they are boring or because there is no hope of improvement.
  • sound symbolism — a nonarbitrary connection between phonetic features of linguistic items and their meanings, as in the frequent occurrence of close vowels in words denoting smallness, as petite and teeny-weeny.
  • sound-and-light — combining sound effects or music with unusual lighting displays: to promote a product with a spectacular sound-and-light presentation.
  • special student — a student who is not seeking a degree but enrols in a course, esp to gain academic credits
  • stannic sulfide — a yellowish or brownish, water-insoluble powder, SnS 2 , usually used suspended in lacquer or varnish for gilding and bronzing metals, wood, paper, etc.; mosaic gold.
  • student council — a representative body composed chiefly of students chosen by their classmates to organize social and extracurricular activities and to participate in the government of a school or college.
  • subsidiary cell — Immunology. any of various cells of the immune system that work with T or B cells to initiate a specific immune response.
  • sulfanilic acid — a grayish-white, crystalline, slightly water-soluble solid, the para form of C 6 H 7 NO 3 S, used chiefly as an intermediate in the manufacture of dyes.
  • sulfur trioxide — an irritant, corrosive, low-melting solid, SO 3 , obtained by the oxidation of sulfur dioxide, used as an intermediate in the manufacture of sulfuric acid.
  • sulphur dioxide — a colourless soluble pungent gas produced by burning sulphur. It is both an oxidizing and a reducing agent and is used in the manufacture of sulphuric acid, the preservation of a wide range of foodstuffs (E220), bleaching, and disinfecting. Formula: SO2
  • sulphurous acid — an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3
  • summer holidays — the time when children do not go to school in the summer
  • superindividual — greater than the individual
  • surgical needle — a needle for suturing.
  • sustained yield — the continuing supply of a natural resource, as timber, through scheduled harvests to insure replacement by regrowth or reproduction.
  • system building — a method of building in which prefabricated components are used to speed the construction of buildings
  • thousand island — of or relating to the Thousand Islands or their inhabitants
  • thursday island — an island in Torres Strait between NE Australia and New Guinea; part of Queensland: pearl fishing. 1½ sq. mi. (4 sq. km).
  • titius-bode law — Bode's law.
  • tokelau islands — a group of islands in the S Pacific Ocean belonging to New Zealand. 4 sq. mi. (10 sq. km).
  • torsion modulus — a coefficient of elasticity of a substance, expressing the ratio between the force per unit area (shearing stress) that laterally deforms the substance and the shear (shearing strain) that is produced by this force.
  • transindividual — a single human being, as distinguished from a group.
  • treasure island — (italics) a novel (1883) by R. L. Stevenson.
  • tricotyledonous — having three cotyledons.
  • tricuspid valve — the valve, consisting of three triangular flaps of tissue between the right auricle and ventricle of the heart, that keeps blood from flowing back into the auricle.
  • tunbridge wells — a city in SW Kent, in SE England: mineral springs; resort.
  • turkish delight — a candy made of fruit juice and gelatin, cubed and dusted with sugar.
  • two-thirds rule — a former rule in the Democratic Party, effective 1832–1936, requiring a vote of at least two thirds of its national convention delegates to nominate a presidential and vice-presidential candidate.
  • ultra-modernist — very advanced in ideas, design, or techniques.
  • ultrafastidious — extremely fastidious
  • un-considerable — rather large or great in size, distance, extent, etc.: It cost a considerable amount. We took a considerable length of time to decide.
  • unadvisableness — the quality of being imprudent or not advisable
  • unalaska island — a large volcanic island in SW Alaska, in the Aleutian Islands. Length: 120 km (75 miles). Greatest width: about 40 km (25 miles)
  • unconsolidation — an act or instance of consolidating; the state of being consolidated; unification: consolidation of companies.
  • unconstrainedly — in an unconfined manner
  • understandingly — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
  • undisciplinable — unable to be disciplined or controlled
  • universal donor — a person with blood of group O.
  • unknown soldier — an unidentified soldier killed in battle and buried with honors, the tomb serving as a memorial to all the unidentified dead of a nation's armed forces. The tomb of the American Unknown Soldier, commemorating a serviceman killed in World War I, was established in the Arlington National Cemetery in Virginia in 1921. In 1958, the remains of personnel of World War II and the Korean War were buried alongside the tomb (now called the Tomb of the Unknowns, ). In 1984, a serviceman of the Vietnam War was interred next to the others.
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