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pla•gi•o•clase



Pronunciation: (plā'jē-u-klās"), [key]
n.
any of the feldspar minerals varying in composition from acidic albite, NaAlSi3O8, to basic anorthite, CaAl2Si2O8, found in most igneous rocks: shows twinning striations on good cleavage surfaces. Also called soda-lime feldspar.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

plagiocephalyplagiohedral
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