from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mineral, aluminum silicate (Al2SiO5), usually found in orthorhombic crystals of various colors.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An aluminium nesosilicate mineral, Al2SiO5.
from the GNU version of the Collaborative International Dictionary of English
- n. A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain.
from The Century Dictionary and Cyclopedia
- n. A mineral of a gray, green, bluish, flesh, or rose-red color, consisting of anhydrous silicate of aluminium, sometimes found crystallized in four-sided rhombic prisms.
After Andalusia .(American Heritage® Dictionary of the English Language, Fourth Edition)