Noun: oligoclase 'ó-li-gow,kleys or u'li-gu,kleys [N. Amer], 'ó-li-gu,kleyz or u'li-gu,kleyz [Brit]- 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