anorthite


an·or·thite

noun \ə-ˈnr-ˌthīt\

Definition of ANORTHITE

:  a white, grayish, or reddish feldspar occurring in many igneous rocks
an·or·thit·ic \ˌa-nr-ˈthi-tik\ adjective

Origin of ANORTHITE

French, from a- + Greek orthos straight
First Known Use: 1823

anorthite

noun    (Concise Encyclopedia)

Feldspar mineral, calcium aluminosilicate (CaAlSiO), that occurs as white or grayish, brittle, glassy crystals. Primarily a rock-forming mineral, it is used in the manufacture of glass and ceramics. Anorthite occurs in basic igneous rocks (see acid and basic rocks).

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