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18-letter words that end in tion

  • racial segregation — social policy: separation of races
  • 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.
  • rational operation — any of the mathematical operations of addition, subtraction, multiplication, and division.
  • reaction formation — a behavioral tendency developed in direct opposition to a repressed impulse.
  • recharacterization — portrayal; description: the actor's characterization of a politician.
  • recovery operation — the process of locating and retrieving bodies, esp following an explosion or natural disaster
  • 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
  • roman congregation — any of the executive departments of the Curia Romana as the administration of the Roman Catholic Church.
  • rubbish collection — the collection of domestic refuse for disposal
  • 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.
  • 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.
  • seasonal promotion — Seasonal promotions are items marketed to customers at the appropriate time of year, such as coats in the winter and bathing suits in the summer.
  • seasonal variation — season-related variation
  • selective abortion — the aborting of particular embryos for medical or social reasons
  • self-actualization — the achievement of one's full potential through creativity, independence, spontaneity, and a grasp of the real world.
  • self-certification — statement of sick leave
  • self-contemplation — the act or process of thinking about oneself or one's values, beliefs, behavior, etc.
  • self-contradiction — an act or instance of contradicting oneself or itself.
  • self-determination — determination by oneself or itself, without outside influence.
  • self-fertilization — Botany. fertilization of an ovum of a plant by a male gamete from the same flower (opposed to cross-fertilization).
  • self-glorification — a glorified or more splendid form of something.
  • self-gratification — the act of pleasing or satisfying oneself, especially the gratifying of one's own impulses, needs, or desires.
  • self-incrimination — the act of incriminating oneself or exposing oneself to prosecution, especially by giving evidence or testimony.
  • self-interrogation — the act of interrogating; questioning.
  • 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-manifestation — an act of manifesting.
  • self-mortification — the inflicting of pain or privation on oneself: He was certain that self-mortification was the only road to salvation.
  • self-preoccupation — the state of being preoccupied.
  • self-recrimination — the act of recriminating, or countercharging: Hope gave way to recrimination with both sides claiming the moral high ground.
  • sense of direction — Your sense of direction is your ability to know roughly where you are, or which way to go, even when you are in an unfamiliar place.
  • sex discrimination — the practice of treating male and female people unequally
  • 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.
  • solvent extraction — Solvent extraction is the separation of a particular substance from a mixture by dissolving that substance in a solvent that will dissolve it, but which will not dissolve any other substance in the mixture.
  • spaghetti junction — an interchange, usually between motorways, in which there are a large number of underpasses and overpasses and intersecting roads used by a large volume of high-speed traffic
  • special collection — a collection of materials segregated from a general library collection according to form, subject, age, condition, rarity, source, or value.
  • speech recognition — Computers. the computerized analysis of spoken words in order to identify the speaker, as in security systems, or to respond to voiced commands: the analysis is performed by finding patterns in the spectrum of the incoming sound and comparing them with stored patterns of elements of sound, as phones, or of complete words.
  • sperry corporation — (company)   The company which merged with the Burroughs Corporation to form Unisys Corporation. Divisions included Sperry Univac, Sperry Flight Systems, and others. Some of these were sold off after the merger.
  • spin stabilization — a technique by which a bullet, rocket, etc, is made to spin around its longitudinal axis to assist it in maintaining a steady flight path
  • stand at attention — military: stand straight
  • standard deviation — a measure of dispersion in a frequency distribution, equal to the square root of the mean of the squares of the deviations from the arithmetic mean of the distribution.
  • station-to-station — (of a long-distance telephone call) chargeable upon speaking with anyone at the number called: a station-to-station call to his home in Dallas.
  • strong interaction — the interaction between gluons and between gluons and quarks that is responsible for the strong force.
  • sub-classification — to arrange in subclasses.
  • symmetric function — a polynomial in several indeterminates that stays the same under any permutation of the indeterminates.
  • talent competition — a contest in which people compete by showcasing their talents, for example in singing, dancing, acrobatics, etc
  • teacher evaluation — the process of vetting teachers to maintain teaching standards
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