Dictionary
hy•per•sthene
Pronunciation: (hī'purs-thēn"), [key]—
n. Mineral.
a dark iron magnesium silicate, an orthorhombic pyroxene containing more than 14 percent ferrous oxide. Cf.
bronzite, enstatite.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.