• Definition for "biotite"
    • A dark-brown or dark-green to black colored mica,…
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  • Sentence for "biotite"
    • In certain minerals, notably the brown…
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  • Hyponym for "biotite"
  • Same Context for "biotite"

biotite definition

  • noun:
    • A dark-brown or dark-green to black colored mica, K(Mg,Fe)3(Al,Fe)Si3O10(OH)2, present in igneous and metamorphic rocks.
    • A dark brown mica; it's a mixed aluminosilicate and fluoride of potassium, magnesium and metal.
    • Mica containing iron and magnesia, generally speaking of a black or dark green shade; -- a common constituent of crystalline rocks. See mica.
    • An important member of the mica group of nutrients. See mica.
    • brownish to black mica present igneous and metamorphic rock
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