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