/ Dictionary / Index C carbonaceous: Meaning and Definition of Find definitions for: car•bo•na•ceous Pronunciation: (kär"bu-nā'shus), [key] — adj. of, like, or containing carbon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: carbonaceous (Thesaurus) carbon-14 dating carbonado Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language