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17-letter words containing f, a, l, c, u

  • molecular formula — a chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.
  • monarch butterfly — a large, deep-orange butterfly, Danaus plexippus, having black and white markings, the larvae of which feed on the leaves of milkweed.
  • natural frequency — the frequency at which a system vibrates when set in free vibration
  • nuclear-free zone — any area in which nuclear weapons, power plants, or materials are not allowed.
  • peacock butterfly — a European nymphalid butterfly, Inachis io, having reddish-brown wings each marked with a purple eyespot
  • political refugee — a person who has fled from a homeland because of political persecution.
  • pre-qualification — a quality, accomplishment, etc., that fits a person for some function, office, or the like.
  • procurator fiscal — In the Scottish legal system, the procurator fiscal is a public official who puts people on trial.
  • purple of cassius — a purple pigment precipitated as a sol by the interaction of gold chloride and a solution of stannic acid and stannous chloride: used chiefly in the manufacture of ruby glass, ceramic glazes, and enamels.
  • pyrosulfuric acid — a strong, crystalline acid, H2S2O7, prepared commercially as a heavy, oily, fuming liquid: used in making explosives and dyes, as a sulfating agent, etc.
  • quadratic formula — the formula for determining theroots of a quadratic equation from its coefficients: .
  • qualified success — If you describe something as a qualified success, you mean that it is only partly successful.
  • rational function — a function that can be written as the quotient of two polynomials with integral coefficients.
  • recursion formula — a formula for determining the next term of a sequence from one or more of the preceding terms.
  • reduction formula — a formula, such as sin (90° ± A) = cos A, expressing the values of a trigonometric function of any angle greater than 90° in terms of a function of an acute angle
  • reflection nebula — a cloud of interstellar gas and dust that reflects the light of neighboring stars.
  • republic of china — People's Republic of, a country in E Asia. 3,691,502 sq. mi. (9,560,990 sq. km). Capital: Beijing.
  • republic of korea — a former country in E Asia, on a peninsula SE of Manchuria and between the Sea of Japan and the Yellow Sea: a kingdom prior to 1910; under Japanese rule 1910–45; now divided at 38° N into North Korea and South Korea. Compare Korean War.
  • republic of palau — a republic comprising a group of islands in the W Pacific, in the W Caroline Islands; administratively part of the UN Trust Territory of the Pacific Islands 1947–87; entered into an agreement of free association with the US (1980); became fully independent in 1994. Chief island: Babelthuap. Capital: Ngerulmud on Babelthuap (functions moved from Koror in 2006). Pop: 21 108 (2013 est). Area: 476 sq km (184 sq miles)
  • republic-of-china — People's Republic of, a country in E Asia. 3,691,502 sq. mi. (9,560,990 sq. km). Capital: Beijing.
  • return of capital — A return of capital is a situation in which you receive back money that was previously invested.
  • road-fund licence — a licence showing that the tax payable in respect of a motor vehicle has been paid
  • self-purification — a natural process of purifying, as the ability of a body of water to rid itself of pollutants.
  • self-renunciation — renunciation of one's own will, interests, etc.
  • sexual preference — Someone's sexual preference is the same as their sexual orientation.
  • silk manufacturer — a person or business that is involved in the manufacture of silk thread and fabric
  • spatial frequency — the measure of fine detail in an optical image in terms of cycles per millimetre
  • the final curtain — the closing of the curtain at the end of the action of a play
  • thiosulfuric acid — an acid, H 2 S 2 O 3 , that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur.
  • unclassified road — a road that has not been given a grade because it is of a basic standard
  • uncomfortableness — causing discomfort or distress; painful; irritating.
  • unofficial strike — a strike that is not approved by the strikers' trade union
  • walleye surfperch — a common black and silvery surfperch (Hyperprosopon argenteum) found off the coast of California
  • wave-cut platform — a flat surface at the base of a cliff formed by erosion by waves
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