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18-letter words containing o, u, t, f, i, s

  • perfect continuous — perfect progressive.
  • piecewise function — a function whose definition changes depending on the value of the independent variable
  • population figures — population totals; statistics relating to the size of populations
  • potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
  • prefect of studies — a senior master in a Jesuit school or college
  • presumption of law — a presumption based upon a policy of law or a general rule and not upon the facts or evidence in an individual case.
  • purple loosestrife — an Old World plant, Lythrum salicaria, of the loosestrife family, widely naturalized in North America, growing in wet places and having spikes of reddish-purple flowers.
  • quality of service — (communications, networking)   (QoS) The performance properties of a network service, possibly including throughput, transit delay, priority. Some protocols allow packets or streams to include QoS requirements.
  • radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
  • recursive function — a function defined in terms of the repeated application of a number of simpler functions to their own values, by specifying a base clause and a recursion formula
  • russian federation — a republic extending from E Europe to N and W Asia. 6,593,000 sq. mi. (17,076,000 sq. km). Capital: Moscow.
  • safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
  • security of tenure — (in Britain) the right of a tenant to continue to occupy a dwelling or site unless the landlord obtains a court order for possession of the property or termination of the tenancy agreement
  • self-actualization — the achievement of one's full potential through creativity, independence, spontaneity, and a grasp of the real world.
  • self-instructional — pertaining to or constituting learning materials and conditions arranged so that students can proceed to learn on their own with little or no supervision.
  • self-justification — the act or fact of justifying oneself, especially of offering excessive reasons, explanations, excuses, etc., for an act, thought, or the like.
  • self-preoccupation — the state of being preoccupied.
  • shift one's ground — to change one's argument or defense
  • six-finger country — an isolated area considered as being inhabited by people who practise inbreeding
  • slip of the tongue — If you describe something you said as a slip of the tongue, you mean that you said it by mistake.
  • sodium hyposulfite — sodium thiosulfate.
  • sodium thiosulfate — a white, crystalline, water-soluble powder, Na 2 S 2 O 3 ⋅5H 2 O, used as a bleach and in photography as a fixing agent.
  • soft touch sealing — Soft touch sealing is a copolymer seal for a tank, with characteristics designed for softness, used instead of a metal seal to help avoid fire when sparks are generated.
  • soldier of fortune — a person who independently seeks pleasure, wealth, etc., through adventurous exploits.
  • solid-fuel heating — heating that uses solid fuel, such as coal or coke
  • spectrofluorimeter — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
  • squinting modifier — a word or phrase that can modify either the words that precede it or those that follow, as frequently in the sentence Studying frequently is tedious.
  • standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
  • state of the union — A State of the Union speech or address is a speech, given once a year, in which the president of the United States talks about the current political issues that affect the country as a whole and about his plans for the year ahead.
  • stirling's formula — a relation that approximates the value of n factorial (n!), expressed as .
  • sub-classification — to arrange in subclasses.
  • sugarloaf mountain — a mountain in SE Brazil in Rio de Janeiro, at the entrance to Guanabara Bay. 1280 feet (390 meters).
  • sutton-in-ashfield — a market town in N central England, in W Nottinghamshire. Pop: 41 951 (2001)
  • symmetric function — a polynomial in several indeterminates that stays the same under any permutation of the indeterminates.
  • the final solution — the code name used by the Nazis to refer to the plan of mass murder of the Jews
  • thrift-institution — economical management; economy; frugality.
  • to play favourites — to display favouritism
  • torsion-free group — a group in which every element other than the identity has infinite order.
  • treasury of merits — the superabundant store of merits and satisfactions, comprising those of Christ, the Virgin Mary, and the saints.
  • tufted loosestrife — a primulaceous plant Naumburgia thyrsiflora
  • tune someone grief — to annoy or harass someone
  • turn in on oneself — to withdraw or cause to withdraw from contact with others and become preoccupied with one's own problems
  • under the aegis of — guided or protected by
  • uriniferous tubule — a urine-bearing tubule in a nephron of a kidney.
  • white-footed mouse — any of several North American woodland mice of the genus Peromyscus, especially P. leucopus, having white feet and undersides.
  • zone of saturation — the ground below the water table
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