/ Dictionary / Index F formyl group: Meaning and Definition of Find definitions for: for'myl group" Pronunciation: [key] — Chem. Chem. the univalent group HCO–, derived from formic acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. formylate Fornax Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language