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copper

noun
- a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
Synonyms: atomic number 29, Cu - a copper penny
- uncomplimentary terms for a policeman
Synonyms: bull, cop, fuzz, pig
verb
- coat with a layer of copper
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