- A reddish-brown color, like that of polished copper.
- Of or of the nature of copper.
- (chemistry) Containing copper.
- Of a reddish-brown color, like that of polished copper.
- (of or of the nature of copper): cuprous
- (of a reddish-brown color): auburn, brassy, copper-colored (US), copper-coloured (UK), coppery, russet