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 tree species of genus Aesculus, especially Aesculus hippocastanum, common in temperate northern hemisphere.
The large nutlike seed of these trees.