Any of various lycaenid butterflies with copper-coloured upperwings, especially those of the genera Lycaena and Paralucia.
The reddish-brown colour/color of copper.
A police officer.
A reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, symbol Cu, and atomic number 29.
To sheathe or coat with copper.
Made of copper.
Having the reddish-brown colour/color of copper.
Any of several unrelated American songbirds having red plumage, especially the tanager or cardinal.
Any of various red cars formerly used in the New York City subway system; or a train of such cars.
A capsule of secobarbital.