'Zinkenite' definitions:

Definition of 'zinkenite'

(from WordNet)
noun
A steel grey metallic mineral (a sulphide of lead and antimony)

Definition of 'Zinkenite'

From: GCIDE
  • Zinkenite \Zink"en*ite\ (-en*[imac]t), n. [From Zinken, director at one time of the Hanoverian mines.] (Min.) A steel-gray metallic mineral, a sulphide of antimony and lead. [1913 Webster]