Etymology

sanidine

S1A1N1I1D2I1N1E1

Today it means: A variety of orthoclase feldspar found as tabular crystals embedded in volcanic rocks. Some forms (called moonstone) exhibit adularescence. Full definition →

Ancient Greek σανίς
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The story

  1. Ancient Greek · derived fromσανίς“board”
  2. English todaysanidine

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

Etymology from Wiktionary, CC BY-SA 4.0.