/ Dictionary / Index M molecular distillation: Meaning and Definition of Find definitions for: molec'ular distilla'tion Pronunciation: [key] a vacuum distillation in which the molecules of the distillate reach the condenser before colliding with one another. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. molecular clock molecular film Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language