Definitions for "Niter"
A white crystalline semitransparent salt; potassium nitrate; saltpeter. See Saltpeter.
(KNO3) used especially as a fertilizer and explosive
Either saltpeter (potassium nitrate) or "the volatile niter," a hypothetical component of the atmosphere that formed the respirable part of air and supplied a principle of life to the world.
Keywords:  natron, sodium, native, carbonate
Native sodium carbonate; natron.