Etymology
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carbonaceous (adj.)

1791, "pertaining to or consisting of charcoal or coal;" 1794, "pertaining to or consisting of carbon;" see carbon + -aceous.

updated on October 09, 2017

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Definitions of carbonaceous from WordNet

carbonaceous (adj.)
relating to or consisting of or yielding carbon;
Synonyms: carbonous / carbonic / carboniferous
From wordnet.princeton.edu, not affiliated with etymonline.