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

Derived forms: oligoclases

Type of: feldspar, felspar

Part of: basalt, dacite

Encyclopedia: Oligoclase