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Meaning of hypersthene

hy•per•sthene

Pronunciation: (hī'purs-thēn"), [key]
— n. Mineral.
  1. 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.