| COPP | any of various small butterflies of the family Lycaenidae having copper colored wings |
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| COPP | a reddish brown the color of polished copper |
| COPP | (informal) uncomplimentary terms for a policeman |
| COPP | a copper penny |
| COPP | a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element |
| COPP | coat with a layer of copper |
| COPP | variety of European beech with shining purple or copper-colored leaves |
| COPP | a reddish brown the color of polished copper |
| COPP | having the color of copper |
| COPP | a heavy gray mineral that is an ore of copper |
| COPP | a mine where copper is dug from the ground |
| COPP | enlargement of the nose with dilation of follicles and redness and prominent vascularity of the skin |