from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A variety of plagioclase feldspar found in igneous rocks and characterized by brilliant colors in some specimens.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A plagioclase feldspar mineral, calcium sodium aluminum silicate, often very coarsely crystalline, used as a decorative stone for carvings and building façades.
from the GNU version of the Collaborative International Dictionary of English
- n. A kind of feldspar commonly showing a beautiful play of colors, and hence much used for ornamental purposes. The finest specimens come from Labrador. See feldspar.
from The Century Dictionary and Cyclopedia
- n. A lime-soda feldspar (see feldspar), one of the species intermediate between the lime feldspar, anorthite, and the soda feldspar, albite, but more closely allied to the former.
After the Labrador (Peninsula) .(American Heritage® Dictionary of the English Language, Fourth Edition)
Labrador + -ite (Wiktionary)