Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An almost pure copper produced in an intermediate stage of copper refining.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an impure form of copper having a black blistered surface
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[From its blistered appearance.]
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Examples
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