Hypertext Webster Gateway: "Hypersthene"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Hypersthene \Hy"per*sthene\, n. [Gr. "ype`r over + ? 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.
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