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Entry 2 senses Webster, 1913

fractionation

· frac·tion·a·tion · IPA
01 n. the act or process of separating a mixture into portions of different composition, as in distillation or fractional crystallization.
  1. 1.
    the act or process of separating a mixture into portions of different composition, as in distillation or fractional crystallization.
  2. 2.
    Separation of crude oil into components of differing composition by fractional distillation.(Petroleum industry)
Syn. fractional process.