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copper1 British & World English

A red-brown metal, the chemical element of atomic number 29

copper2 British & World English

A police officer

copper New Oxford Dictionary for Writers & Editors

chemical element of atomic number 29

Cu in copper1 British & World English

A red-brown metal, the chemical element of atomic number 29

Copper Age British & World English

The Chalcolithic period, especially in SE Europe

copper beech British & World English

A beech tree of a variety with purplish-brown leaves

copper-fasten British & World English

Make (an undertaking or agreement) firm or binding

blister copper British & World English

Partly purified copper with a blistered surface formed during smelting

copper-bottomed British & World English

Thoroughly reliable; certain not to fail

copper-coloured British & World English

Of a reddish-brown colour like that of copper

copper pyrites British & World English

Another term for chalcopyrite.

copper sulphate British & World English

A blue crystalline solid used in electroplating and as a fungicide

copperplate British & World English

A polished copper plate with a design engraved or etched into it

copper sulfate in copper sulphate British & World English

A blue crystalline solid used in electroplating and as a fungicide