/ Dictionary / Index V vinylidene group: Meaning and Definition of Find definitions for: vinyl'idene group" Pronunciation: [key] — Chem. Chem. the bivalent group CH, derived from ethylene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vinylidene chloride vinylidene resin 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