Hypersthene

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hypersthene \Hy"per*sthene\ (h[imac]"p[~e]r*sth[=e]n), n. [Gr.
     "ype`r over + sqe`nos strength: cf. F. hyperst[`e]ne.] (Min.)
     An orthorhombic mineral of the pyroxene group, of a grayish
     or greenish black color, often with a peculiar bronzelike
     luster (schiller) on the cleavage surface.
     [1913 Webster]