Anorthite

noun

Definitions

Noun
  1. 1
    A variety of plagioclase feldspar, the calcium endmember of that series. countable, uncountable
  2. 2
    rare plagioclastic feldspar occurring in many igneous rocks wordnet

Etymology

From Ancient Greek αν- (an-, “not”) + ὀρθός (orthós, “straight”) "not perpendicular; less than straight", in reference to its odd.

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