Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun biotite

1 sense of biotite

Sense 1
biotite -- (dark brown to black mica found in igneous and metamorphic rock)
       => mica, isinglass -- (any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity)