fractionation

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English

Etymology

By surface analysis, fraction +‎ -ation, or, by surface analysis, fractionate +‎ -ion.

Noun

fractionation (countable and uncountable, plural fractionations)

  1. (chemistry, uncountable, countable) A separation process in which a certain quantity of a mixture is divided up into smaller quantities (fractions) in which the composition changes according to a gradient; an instance of this process.
    Hyponym: fractional distillation
    Methane is separated from other hydrocarbons in a gas fractionation plant.
    After several fractionations, we had a usable product.
  2. (radiotherapy) The division of a total dose of radiation into fractions.
    Hyponym: hyperfractionation
  3. (cryptography) A preliminary stage of encryption that divides each plaintext symbol into several ciphertext symbols.
  4. A form of hypnosis where the patient is made to enter and leave a trance state many times in quick succession.

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