Source : Webster's Revised Unabridged Dictionary (1913)

Selenite \Sel"e*nite\, n. (Chem.)
   A salt of selenious acid.

Selenite \Sel"e*nite\, n. [L. selenites, Gr. ???? (sc. ???),
   from ??? the moon. So called from a fancied resemblance in
   luster or appearance to the moon.] (Min.)
   A variety of gypsum, occuring in transparent crystals or
   crystalline masses.