/ Dictionary / Index B butyryl group: Meaning and Definition of Find definitions for: bu'tyryl group" Pronunciation: [key] — Chem. Chem. the univalent group CHO–. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. butyryl buxom Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language