- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hypersthene
Hypersthene (or bronzite) is characteristic of another group.
Hypersthene, when present, is often strikingly pleochroic in colours varying from pink to bright green.
Some contain biotite, others augite or hypersthene; many have a small amount of quartz.
Green augite and hypersthene form a considerable part of these rocks, they may contain also biotite, hornblende and quartz.
It may be noted also that hypersthene shows a tendency to magmatic alteration, although only rarely.Mount Rainier
- a green, brown, or black pyroxene mineral consisting of magnesium iron silicate in orthorhombic crystalline form. Formula: (Mg,Fe) 2 Si 2 O 6
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