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18-letter words containing u, n, a, t, r, i

  • 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).
  • quality controller — a person responsible for checking that the goods or services produced by an organization are of an acceptable standard
  • quantity surveying — the action or profession of a person who estimates the cost of the materials and labour necessary for a construction job
  • 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
  • quinacrine mustard — a nitrogen mustard derived from mepacrine and used as a stain for chromosomes
  • quite the contrary — not at all, the very opposite
  • 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.
  • reciprocating pump — A reciprocating pump is a pump which uses a backward and forward movement to move a fluid.
  • recruitment agency — company that places job candidates
  • 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
  • reinsurance treaty — A reinsurance treaty is a contract that defines the terms of reinsurance business.
  • relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
  • renter's insurance — Renter's insurance is insurance for renters to insure their property against loss.
  • residual magnetism — remanence.
  • resurrection plant — a desert plant, Selaginella lepidophylla, occurring from Texas to South America, having stems that curl inward when dry.
  • resuscitation room — an intensive care unit
  • revolutionary wars — American Revolution.
  • roman architecture — buildings in style of ancient Rome
  • running commentary — non-stop description of sth
  • running martingale — martingale (def 2).
  • rural municipality — any lightly settled area in Canada lacking a local elected government and administered directly by a provincial government.
  • 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.
  • russian revolution — Also called February Revolution. the uprising in Russia in March, 1917 (February Old Style), in which the Czarist government collapsed and a provisional government was established.
  • safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
  • 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.
  • saturation bombing — intense area bombing intended to destroy everything in the target area.
  • sault sainte marie — the rapids of the St. Marys River, between NE Michigan and Ontario, Canada.
  • schwarz inequality — Also called Cauchy's inequality. the theorem that the inner product of two vectors is less than or equal to the product of the magnitudes of the vectors.
  • scripting language — a language that is used to write scripts, or executable sections of code that automate tasks.
  • 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.
  • securities analyst — an expert who advises on investment in securities such as stocks, shares and bonds
  • security agreement — business: contract
  • security clearance — access to top secret information
  • 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-preoccupation — the state of being preoccupied.
  • self-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
  • sexual intercourse — genital contact, especially the insertion of the penis into the vagina followed by orgasm; coitus; copulation.
  • sexual orientation — one's natural preference in sexual partners; predilection for homosexuality, heterosexuality, or bisexuality.
  • shunting operation — an operation in which rail coaches are manoeuvred
  • simple enumeration — a procedure for arriving at empirical generalizations by haphazard accumulation of positive instances.
  • ski-mountaineering — a combination of the sports of skiing and mountaineering, for example by climbing up a mountain then skiing down it
  • 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.
  • southern rhodesian — a former name (until 1964) of Zimbabwe (def 1).
  • specimen signature — a signature to be compared to an original signature in order to verify someone's identity
  • standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
  • stirling's formula — a relation that approximates the value of n factorial (n!), expressed as .
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