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18-letter words containing d, o, r, t, u

  • productivity bonus — an extra payment made to workers for being more productive or yielding more favourable results than normal
  • programme of study — the prescribed syllabus that pupils must be taught at each key stage in the National Curriculum
  • prometheus unbound — a drama in verse (1820) by Shelley.
  • protective custody — detention of a person by the police solely as protection against a possible attack or reprisal by someone.
  • protocol data unit — (PDU) A packet of data passed across a network. The term implies a specific layer of the OSI seven layer model and a specific protocol.
  • provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
  • pseudo-anarchistic — a person who advocates or believes in anarchy or anarchism.
  • pseudotuberculosis — an acute, sometimes fatal disease of rodents, birds, and other animals, including humans, caused by the bacterium Yersinia (Pasteurella) pseudotuberculosis, and characterized by the formation of nodules resembling those that result from tuberculosis.
  • put heads together — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
  • put your foot down — If someone puts their foot down, they use their authority in order to stop something happening.
  • quadratic equation — an equation containing a single variable of degree 2. Its general form is ax 2 + bx + c = 0, where x is the variable and a, b, and c are constants (a ≠ 0).
  • quarry-tiled floor — a floor covered with square or diamond-shaped unglazed floor tiles
  • quartz-iodine lamp — a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
  • radiation exposure — exposure to radiant energy or to the particles emitted in the transfer of radiant energy, esp the particles and gamma rays emitted in nuclear decay; exposure to radioactive substances
  • radiation pressure — the pressure exerted on a surface by electromagnetic radiation or by sound waves.
  • radiocommunication — communication by means of radio waves
  • 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.
  • red-spotted purple — any color having components of both red and blue, such as lavender, especially one deep in tone.
  • reduction division — the first division of meiosis in which the number of chromosomes is reduced to half the original number.
  • reduction strategy — (theory)   An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
  • reproduction proof — repro proof.
  • return to the fold — come back home
  • rub shoulders with — to mix with socially or associate with
  • runge-kutta method — a numerical method, involving successive approximations, used to solve differential equations.
  • 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.
  • saturated solution — A saturated solution is a solution in which there is so much solute that if there was any more, it would not dissolve.
  • scottish deerhound — one of a Scottish breed of large, tall hunting dogs having a medium-length, wiry, gray or reddish-fawn coat, originally developed for hunting and bringing down deer, and known as the royal dog of Scotland.
  • second triumvirate — the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc
  • secondary industry — manufacturing, services, etc.
  • shift one's ground — to change one's argument or defense
  • shop till you drop — If you shop till you drop, you do a large amount of shopping.
  • sodium bicarbonate — a white, crystalline, water-soluble solid, in powder or granules, NaHCO 3 , usually prepared by the reaction of soda ash with carbon dioxide or obtained from the intermediate product of the Solvay process by purification: used chiefly in the manufacture of sodium salts, baking powder, and beverages, as a laboratory reagent, as a fire extinguisher, and in medicine as an antacid.
  • sodium tetraborate — borax1 .
  • soldier of fortune — a person who independently seeks pleasure, wealth, etc., through adventurous exploits.
  • solubility product — the maximum number of undissociated ions, of an electrolyte in a saturated solution, capable at a given temperature of remaining in equilibrium with the undissolved phase of the solution.
  • song without words — a song which only consists of a tune or melody and does not have any lyrics
  • sound and the fury — a novel (1929) by William Faulkner.
  • sound spectrograph — an electronic device for recording a sound spectogram.
  • southern rhodesian — a former name (until 1964) of Zimbabwe (def 1).
  • 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.
  • stand one's ground — the solid surface of the earth; firm or dry land: to fall to the ground.
  • standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
  • strontium monoxide — a white insoluble solid substance used in making strontium salts and purifying sugar. Formula: SrO
  • student councillor — a student who is a member of a council or body representing the interests of students at a school, university or college
  • subordinate clause — a clause that modifies the principal clause or some part of it or that serves a noun function in the principal clause, as when she arrived in the sentence I was there when she arrived or that she has arrived in the sentence I doubt that she has arrived.
  • sun-dried tomatoes — tomatoes that have been dried or preserved by exposure to the sun
  • supraorbital ridge — browridge.
  • tertiary education — education, following secondary education at a school, at a college or university
  • the hotel industry — the branch of the services industry which provides hotels
  • the movie industry — the industry that makes entertainment films or movies
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