/ Dictionary / Index B butyryl: Meaning and Definition of Find definitions for: bu•tyr•yl Pronunciation: (by'tur-il), [key] — adj. Chem. containing the butyryl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. butyrophenone butyryl group 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