/ Dictionary / Index F fractional distillation: Meaning and Definition of Find definitions for: frac'tional distilla'tion Pronunciation: [key] — Chem. Chem. the separation of volatile components of different boiling points in a mixture by the gradual increase of temperature and the separate collection of each component. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fractional currency fractionalize Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language