D defs.my
Entry 1 sense Webster, 1913

Tetrahedrite

· Tet·ra·he·drite · IPA
01 n. A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a con…
  1. 1.
    A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. Called also gray copper ore, fahlore, and panabase.(Min.) Also: gray copper ore, fahlore, panabase