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black copper
noun
- a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.
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Example Sentences
The Black Palmer—dubbed with black copper coloured peacock's harl, and a black cock's hackle over that, wings, blackbird.
The same method is adopted for taking out the black copper in successive layers.
The refining of this black copper is performed in a kind of reverberatory furnace.
The black copper oxide is reduced to reddish metallic copper by the carbon monoxide, which is thereby changed to carbon dioxide.
I lifted up the head which covered his treasure, when to his surprise a few black copper cents made their appearance.
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