from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A monoclinic-prismatic mineral containing aluminum, calcium, fluorine, hydrogen, oxygen, and sodium.
from The Century Dictionary and Cyclopedia
- n. A native fluoride of aluminium, calcium, and sodium, found with cryolite in Greenland, and also in Colorado: so called in allusion to the frost-like appearance of the crystals.
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