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noun sel·e·nite \ˈse-lə-ˌnīt\

Definition of selenite

  1. :  a variety of gypsum occurring in transparent crystals or crystalline masses

Origin and Etymology of selenite

Middle English selinete, from Latin selenites, from Greek selēnitēs (lithos), literally, stone of the moon, from selēnē; from the belief that it waxed and waned with the moon

First Known Use: 15th century

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