/ Dictionary / Index B benzal group: Meaning and Definition of Find definitions for: ben'zal group" Pronunciation: [key] — Chem. Chem. the bivalent group CH–, derived from benzaldehyde. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. benzaldehyde benzalkonium chloride 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