| COPP | an oxide of copper |
|---|---|
| COPP | a yellow copper ore (CuFeS2) made up of copper-iron sulfide |
| COPP | of North American Pacific coastal waters |
| COPP | a copper salt made by the action of sulfuric acid on copper oxide |
| COPP | a copper salt made by the action of sulfuric acid on copper oxide |
| COPP | (British) an informer or spy working for the police |
| COPP | any alloy whose principal component is copper |
| COPP | having a bottom of copper or sheathed with copper |
| COPP | provide with a copper bottom |
| COPP | venomous but sluggish reddish-brown snake of Australia |
| COPP | common coppery brown pit viper of upland eastern United States |
| COPP | an engraving consisting of a smooth plate of copper that has been etched or engraved |