Biotite

ahd-5
  • noun. A dark-brown or dark-green to black mica, K(Mg,Fe)3(Al,Fe)Si3O10(OH)2, found in igneous and metamorphic rocks.
    • The Century Dictionary and Cyclopedia
  • noun. An important member of the mica group of minerals. See mica.
    • the GNU version of the Collaborative International Dictionary of English
  • noun. Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See mica.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A dark brown mica; it is a mixed aluminosilicate and fluoride of potassium, magnesium and iron.
    • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. dark brown to black mica found in igneous and metamorphic rock
    • Word Usage
    "In certain minerals, notably the brown variety of mica known as biotite, the microscope reveals minute circular marks occurring here and there, quite irregularly."
    Hypernym
    Words that are more generic or abstract
    isinglass  mica  
    Hyponym
    Words that are more specific
    lepidomelane  
    Same Context
    Words that are found in similar contexts
    alcoholate  apatite  aperiodic  aquamarine  bhuta  
    variant
    mica  
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