/ Dictionary / Index F fractionator: Meaning and Definition of Find definitions for: frac•tion•a•tor Pronunciation: (frak'shu-nā"tur), [key] — n. an apparatus for fractional distillation. Cf. cracker. any apparatus capable of separating complex liquid substances, as blood, into their component parts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fractionation fractionize Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language