The American Heritage® Dictionary of the English Language, 4th Edition
n. A mineral silicate of iron and magnesium, principally (Mg, Fe)2SiO4, found in igneous and metamorphic rocks and used as a structural material in refractories and in cements. Also called chrysolite.
n. Any of a group of olive green magnesium-iron silicate minerals that crystallize in the orthorhombic system.
the GNU version of the Collaborative International Dictionary of English
n. A common name of the yellowish green mineral chrysolite, esp. the variety found in eruptive rocks. It is a silicate of magnesium and iron ((Mg,Fe)SiO4).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a mineral consisting of magnesium iron silicate; a source of magnesium
Word Usage
"The mineral most subject to this serpentinization process is called olivine—also known in its gemstone form as peridot—and it is common on Mars."