/ Dictionary / Index A aryl group: Meaning and Definition of Find definitions for: ar'yl group" Pronunciation: [key] — Chem. Chem. any organic group derived from an aromatic hydrocarbon by the removal of a hydrogen atom, as phenyl, CH−, from benzene, CH. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arylate arytenoid Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language