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A glassy, usually yellowish gray variety of orthopyroxene having a magnesium silicate base, mainly MgSiO3, usually found embedded in igneous rocks and meteorites.

[Greek enstatēs, adversary (because of its refractory quality) : en-, in, at, near; see en-2 + -statēs, one that stands; see stā- in Indo-European roots + -ite.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) a grey, green, yellow, or brown pyroxene mineral consisting of magnesium silicate in orthorhombic crystalline form. Formula: Mg2Si2O6
[C19: from Greek enstatēs adversary (referring to its refractory quality) + -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈɛn stəˌtaɪt)

a yellow-green fibrous mineral, magnesium silicate, MgSiO3, a pyroxene found in magnesium-rich rocks.
[1855–60; < Greek enstát(ēs) adversary]
en`sta•tit′ic (-ˈtɪt ɪk) adj.
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References in periodicals archive ?
52 or ferrosilite) (1988), 535 Leonhardite (= laumontite) Coombs et al.: Can.