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hypersthene

hy·per·sthene [ hpər sthn ]


noun 
Definition:
 
pyroxene mineral: a green, brown, or black pyroxene mineral containing iron and magnesium

[Early 19th century. < French hypersthène "extremely strong (mineral)" < Greek sthenos "strength"]

hy·per·sthen·ic [ hpər sthénnik ] adjective
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