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of, like, or containing carbon.
Historical Examples

These are what we have mainly to look out for, the carbonaceous foods usually being over abundant.
Hints on Dairying T. D. Curtis

From the above experiments it is inferred that a supply of carbonaceous matter does not increase the crop of barley.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

The carbonaceous residuum is occasionally slightly acted upon.
A Dictionary of Arts, Manufactures and Mines Andrew Ure

The bulk of the grain was corn in the carbonaceous, and wheat in the nitrogenous ration.
The Dollar Hen Milo M. Hastings

When nitre, for instance, is burned with carbonaceous matter, the product is carbonate of potash.
Museum of Antiquity L. W. Yaggy

Next in point of altitude, is the series of dark, carbonaceous, shelly slate rock.
Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 Henry Rowe Schoolcraft

I could not expect shells, for they never occur in this formation; but lignite or carbonaceous shale ought to be found.
More Letters of Charles Darwin Charles Darwin

The blacks and browns were mixtures of carbonaceous matter, with the ores of iron or manganese.
The Life of Sir Humphrey Davy, Bart. LL.D., Volume 2 (of 2) John Ayrton Paris

carbonaceous rocks, composed largely of hydrocarbon compounds.
The Principles of Stratigraphical Geology J. E. Marr

The ores of iron, which are all oxides, are reduced by exposing them to the action of carbonaceous matter, at a high temperature.
The American Quarterly Review Various

adjective
of, resembling, or containing carbon
carbon
(kär’bən)
Symbol C
A naturally abundant, nonmetallic element that occurs in all organic compounds and can be found in all known forms of life. Diamonds and graphite are pure forms, and carbon is a major constituent of coal, petroleum, and natural gas. Carbon generally forms four covalent bonds with other atoms in larger molecules. Atomic number 6; atomic weight 12.011; sublimation point above 3,500°C; boiling point 4,827°C; specific gravity of amorphous carbon 1.8 to 2.1, of diamond 3.15 to 3.53, of graphite 1.9 to 2.3; valence 2, 3, 4. See Periodic Table.

carbonaceous adjective