noun
(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.
(radiotherapy) The division of a total dose of radiation into fractions.
(cryptography) A preliminary stage of encryption that divides each plaintext symbol into several ciphertext symbols.
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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