/ Dictionary / Index H hexyl group: Meaning and Definition of Find definitions for: hex'yl group" Pronunciation: [key] any of five univalent, isomeric groups having the formula CH−. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hexyl hexylresorcinol 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