from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A light green, monoclinic pyroxene mineral, CaMgSi2O6, used as a gemstone and refractory.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A monoclinic pyroxene mineral, a magnesium calcium silicate with the chemical formula CaMgSi2O6, found in igneous and metamorphic rocks.
from the GNU version of the Collaborative International Dictionary of English
- n. A crystallized variety of pyroxene, of a clear, grayish green color; mussite.
from The Century Dictionary and Cyclopedia
- n. A variety or subspecies of pyroxene, containing as bases chiefly calcium and magnesium, with more or less iron.
French : di-, two (from Greek; see di-1) + Greek -opsis, -opsis.(American Heritage® Dictionary of the English Language, Fourth Edition)