anorthite Meaning, Definition & Usage
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noun rare plagioclastic feldspar occurring in many igneous rocks
WordNet
A*nor"thite noun
Etymology
Gr. priv. + straight ( sc. right angle); not in a right angle.Definitions
A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime feldspar. See Feldspar .