'Chalcocite' definitions:

Definition of 'chalcocite'

(from WordNet)
noun
A heavy grey mineral that is an ore of copper [syn: chalcocite, copper glance]

Definition of 'Chalcocite'

From: GCIDE
  • Chalcocite \Chal"co*cite\, n. [Gr. chalko`s brass.] (Min.) Native copper sulphide, called also copper glance, and vitreous copper; a mineral of a black color and metallic luster. [Formerly written chalcosine.] [1913 Webster] Chalcographer