any nanostructure of graphene layers arranged as stacked cones, cups or plates

Alternative spelling of carbon neutral

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