| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Black copper | Mining | A name given to the impure metallic copper produced in blast furnaces running on oxide ores or roasted sulfide material; an alloy of copper with one or more other metals generally containing several percent of iron, commonly lead, and many other impurities; also contains 1% to 3% sulfur. See also: tenorite. (references) | |
| Black copper ore | Mining | An earthy, black, massive, or scaley form of copper oxide, CuO.See also:melaconite; tenorite. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
