from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hydrous magnesium sulfate mineral.
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.
from The Century Dictionary and Cyclopedia
- n. A red or ocher-yellow mineral from Falun in Sweden, consisting of the hydrous sulphates of iron, magnesium, and calcium.
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