1 entry 1 source
Biotite
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.
1 entry 1 source
Part of speech: noun (n.)
Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.