Meaning of FRACTIONAL in English

adj. 1 of or relating to or being a fraction. 2 very slight; incomplete. 3 Chem. relating to the separation of parts of a mixture by making use of their different physical properties (fractional crystallization; fractional distillation). fractionalize (also -ise). fractionally adv. (esp. in sense 2).

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.