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hypersthene

[hahy-pers-theen]
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noun Mineralogy.
  1. a dark iron magnesium silicate, an orthorhombic pyroxene containing more than 14 percent ferrous oxide.

Origin of hypersthene

1800–10; hyper- + Greek sthénos strength, might; replacing hyperstene < French hyperstène
Related formshy·per·sthen·ic [hahy-pers-then-ik] /ˌhaɪ pərsˈθɛn ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hypersthene

hypersthene

noun
  1. a green, brown, or black pyroxene mineral consisting of magnesium iron silicate in orthorhombic crystalline form. Formula: (Mg,Fe) 2 Si 2 O 6
Derived Formshypersthenic (ˌhaɪpəˈsθɛnɪk), adjective

Word Origin

C19: from hyper- + Greek sthenos strength
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012