hypersthene

• POS: Noun
• HYPHEN: hy=per=sthene

CIDE DICTIONARY

hypersthene, n. [Gr. "ype`r over + sqe`nos strength: cf. F. hyperstène.].

 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]

OXFORD DICTIONARY

hypersthene, n. a rock-forming mineral, magnesium iron silicate, of greenish colour.

Etymology

F hyperst{egrave}ne (as HYPER-, Gk sthenos strength, from its being harder than hornblende