Orthoclase

noun

Definitions

Noun
  1. 1
    Potassium aluminum silicate, KAlSi₃O₈, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel. countable, uncountable
  2. 2
    a white or colored monoclinic feldspar wordnet

Etymology

From ortho- + -clase.

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