Hy"per*sthene (?), n. [Gr. over + strength: cf. F. hyperstene.] 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.
© Webster 1913.
Log in or register to write something here or to contact authors.
Need help? firstname.lastname@example.org