from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A glassy, usually yellowish gray variety of orthorhombic pyroxene having a magnesium silicate base, mainly MgSiO3, usually found embedded in igneous rocks and meteorites.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A form of pyroxene consisting solely of magnesium silicate.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral of the pyroxene group, orthorhombic in crystallization; often fibrous and massive; color grayish white or greenish. It is a silicate of magnesia with some iron. Bronzite is a ferriferous variety.
from The Century Dictionary and Cyclopedia
- n. A silicate, chiefly of magnesium, with some iron, belonging to the pyroxene group.
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 + -ite1.(American Heritage® Dictionary of the English Language, Fourth Edition)