from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A green variety of microcline, often used as a semiprecious stone. Also called amazon stone.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a gem variety of microcline feldspar, varying from bright verdigris green to a bluish green.
from the GNU version of the Collaborative International Dictionary of English
- n. A variety of feldspar, having a verdigris-green color.
After the Amazon (River) .(American Heritage® Dictionary of the English Language, Fourth Edition)