/ Dictionary / Index B benzylidene: Meaning and Definition of Find definitions for: ben•zyl•i•dene Pronunciation: (ben-zil'i-dēn"), [key] — adj., n. Chem. benzal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. benzyl group benzylidene acetone Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language