/ Dictionary / Index B benzoyl group: Meaning and Definition of Find definitions for: ben'zoyl group" Pronunciation: [key] — Chem. Chem. the univalent group CHO–, derived from benzoic acid. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. benzoylate benzoyl peroxide Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language