An"a*tron (#), n. [F. anatron, natron, Sp. anatron, natron, fr. Ar. al-natrn. See Natron, Niter.] [Obs.]
1.
Native carbonate of soda; natron.
2.
Glass gall or sandiver.
3.
Saltpeter.
Coxe. Johnson.
© Webster 1913.