from The Century Dictionary.
- noun A white clay-like mineral, void of luster, and essentially a hydrous silicate of aluminium. It occurs as veins in the beds of sandstone covering the calcareous rock near Scarborough in England.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A triclinic white
mineralcontaining aluminum, carbon, hydrogen, and oxygen.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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