carbon monoxide / carbon dioxide / carbon suboxide

A microphone containing carbon granules, whose electrical resistance varies with pressure.

radiocarbon dating.

Any nanostructure, a member of the fullerene family, having graphene layers wrapped into perfect cylinders.

(inorganic chemistry) Alternative form of carbonyl chloride

A reduction in carbon dioxide emission by a third party purchased by a heavy carbon dioxide producer as part of carbon emissions trading.

(chiefly Britain) Alternative spelling of carbon oxysulfide

the process of making carbon prints

(inorganic chemistry) carbonyl sulfide

(chiefly Britain) Alternative spelling of carbon nanofiber