chalcocite Meaning, Definition & Usage

  1. noun a heavy grey mineral that is an ore of copper
    copper glance.

WordNet

Chal"co*cite noun
Etymology
Gr. brass.
Definitions
  1. (Min.) Native copper sulphide, called also copper glance, and vitreous copper; a mineral of a black color and metallic luster. Formerly written chalcosine.

Webster 1913