a dark-colored variety, (Mg,Fe)SiO3
, of enstatite
, containing a large amount of iron; magnesium iron silicate
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
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Word origin of 'hypersthene'
altered (modeled on Gr) < Fr hyperstène
: coined (1803) by R.-J. Haüy (1743-1822), Fr mineralogist < Gr hyper-