What does "sanidine" mean?

A variety of orthoclase feldspar found as tabular crystals embedded in volcanic rocks. Some forms (called moonstone) exhibit adularescence.

Sanidine

noun

noun ·Rare ·Advanced level

Noun

1
A variety of orthoclase feldspar found as tabular crystals embedded in volcanic rocks. Some forms (called moonstone) exhibit adularescence. countable, uncountable

From Ancient Greek σανίς (sanís, “board”) + -ine.