biotite

play
noun bi·o·tite \ˈbī-ə-ˌtīt\

Definition of biotite

  1. :  a generally black or dark green form of mica that is a constituent of crystalline rocks and consists of a silicate of iron, magnesium, potassium, and aluminum

biotitic

play \ˌbī-ə-ˈti-tik\ adjective

Origin and Etymology of biotite

German Biotit, from Jean B. Biot †1862 French mathematician


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