( 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.
( 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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012