anorthite Meaning, Definition & Usage

  1. 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
  1. 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.

Webster 1913