/ Dictionary / Index M molecular film: Meaning and Definition of Find definitions for: molec'ular film' Pronunciation: [key] a film or layer one molecule thick. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. molecular distillation molecular formula Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language