/ Dictionary / Index C carbonyl: Meaning and Definition of Find definitions for: car•bon•yl Pronunciation: (kär'bu-nil), [key] — adj. containing the carbonyl group. —n. a compound containing metal combined with carbon monoxide, as nickel carbonyl, Ni(CO). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: carbonyl (Thesaurus) carbon tissue carbonylate Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language