(chemistry) the vertical group of the periodic table containing carbon, silicon, germanium, tin and lead; the elements have a valence of 4, and show the typical gradation from nonmetal to metal

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