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Noun: plagioclase  'pley-jee-u,kleys or 'pla-jee-u,kleyz [N. Amer], 'pla-jee-u,kleyz or 'pley-jee-u,kleyz [Brit]
  1. Any of a series of triclinic feldspars that form rocks
    "Plagioclase is an important component of many igneous rocks";
    - oligoclase

Derived forms: plagioclases

Type of: feldspar, felspar

Part of: basalt, dacite

Encyclopedia: Plagioclase