from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hydrous silicate of iron and aluminium occurring as an aggregation of minute olive-green scales
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral occurring as an aggregation of minute scales having an olive-green color and pearly luster. It is a hydrous silicate of aluminia and iron.
from The Century Dictionary and Cyclopedia
- n. In mineralogy, a hydrous silicate of iron and aluminium, occurring as an aggregate of minute scales which are distinctly cleavable in one direction, and have an olivegreen color and nacreous luster.
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