from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white, pale pink, or pale green crystalline mineral, essentially KCa4Si8O20(F,OH)·8H2O.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several forms of a pale pink or green mineral being a mixed fluoride and silicate of potassium and calcium.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral relating to the zeolites, usually occurring in square prisms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.
from The Century Dictionary and Cyclopedia
- n. A mineral allied to the zeolites, occurring in laminated masses or in tetragonal crystals, and having a strong pearly luster on the surface of perfect cleavage, parallel to which it separates readily into thin laminæ.
Sorry, no etymologies found.