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plagioclase: Meaning and Definition of
pla•gi•o•clase
Pronunciation: (plā'jē-u-klās"), [key]
— n.
- any of the feldspar minerals varying in composition from acidic albite, NaAlSiO, to basic anorthite, CaAlSiO, found in most igneous rocks: shows twinning striations on good cleavage surfaces. Also called
See also:
- plagioclase (Thesaurus)
