Nouns

(n)carbon, C, atomic number 6an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
(n)carbon paper, carbona thin paper coated on one side with a dark waxy substance (often containing carbon); used to transfer characters from the original to an under sheet of paper
(n)carbon, carbon copya copy made with carbon paper