The Collaborative International Dictionary of English v.0.48:
Carbonaceous \Car"bo*na`ceous\, a. Pertaining to, containing, or composed of, carbon. [1913 Webster] CarbonadeWordNet (r) 3.0 (2006):
carbonaceous adj 1: relating to or consisting of or yielding carbon [syn: carbonaceous, carbonous, carbonic, carboniferous]