black copper (English, noun)
expansion: black copper (uncountable)
Senses:
topics: chemistry
geography
geology
mineralogy
natural-sciences
physical-sciences
glosses: A mineral form of cupric oxide
tags: uncountable
topics: engineering
metallurgy
natural-sciences
physical-sciences
glosses: Copper with iron and sulfur impurities due to insufficient smelting.
tags: uncountable
Forms: