Source : Webster's Revised Unabridged Dictionary (1913)

Anatron \An"a*tron\, n. [F. anatron, natron, Sp. anatron,
   natron, fr. Ar. al-natr[=u]n. See {Natron}, {Niter}.] [Obs.]
   1. Native carbonate of soda; natron.

   2. Glass gall or sandiver.

   3. Saltpeter. --Coxe. --Johnson.