from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An orthorhombic-dipyramidal mineral containing chlorine, hydrogen, iron, oxygen, and potassium.
from The Century Dictionary and Cyclopedia
- n. A hydrous chlorid of potassium and ferric iron, found as a red deliquescent coating on the lava of Vesuvius after the eruption of April, 1872.
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