copper

Universal Words noun 1 [U] (Symbol Cu) a chemical element. Copper is a soft reddish-brown metal used for making electric wires, pipes and coins: a copper mine * copper wire / pipes * copper-coloured hair 2 (coppers) [pl.] (BrE) brown coins that do not have much value: I only paid a few coppers for it. 3 [C] (BrE, informal) a police officer