feldspar: Meaning and Definition of

feld•spar

Pronunciation: (feld'spär", fel'-), [key]
— n.
  1. any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
Feldene feldspathic
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