biotite

Noun
  1. Dark brown to black mica found in igneous and metamorphic rock (synset 114692904)
    is a type of: isinglass, mica - 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
    subtypes: lepidomelane - a mica that is a biotite containing iron

Found on Word Lists

Other Searches