/ Dictionary / Index H hexyl: Meaning and Definition of Find definitions for: hex•yl Pronunciation: (hek'sil), [key] — adj. containing a hexyl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hex sign hexyl group 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