carbon, C, atomic number 6 -- (an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds)
carbon paper, carbon -- (a 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)
carbon, carbon copy -- (a copy made with carbon paper)
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