from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Sodium calcium aluminum silicate, (), a plagioclase feldspar, the third member of the albite-anorthite solid solution series. Found in fine-grained andesite lavas; crystals are rarely seen.
from the GNU version of the Collaborative International Dictionary of English
- n. A kind of triclinic feldspar found in the Andes.
Named for the type locality in the Andes Mountains. (Wiktionary)