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

Related Sources

  • Definition for "biotite"
    • A dark-brown or dark-green to black colored mica,…
    • View More
  • Sentence for "biotite"
    • In certain minerals, notably the brown…
    • View More
77 votes

How would you define biotite?

All the definitions on AZdictionary were written by people just like you. Now's your chance to add your own!