[W/K] :: Niter

  Niter \Ni"ter\, Nitre \Ni"tre\, n. [F. nitre, L. nitrum native
     soda, natron, Gr. ?; cf. Ar. nit[=u]n, natr[=u]n natron. Cf.
     Natron.]
     1. (Chem.) A white crystalline semitransparent salt;
        potassium nitrate; saltpeter. See Saltpeter.
        [1913 Webster]
  
     2. (Chem.) Native sodium carbonate; natron. [Obs.]
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              For though thou wash thee with niter, and take thee
              much soap, yet thine iniquity is marked before me.
                                                    --Jer. ii. 22.
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     Cubic niter, a deliquescent salt, sodium nitrate, found as
        a native incrustation, like niter, in Peru and Chile,
        whence it is known also as Chile saltpeter.
  
     Niter bush (Bot.), a genus ({Nitraria) of thorny shrubs
        bearing edible berries, and growing in the saline plains
        of Asia and Northern Africa.
        [1913 Webster]

  niter
       n : (KNO3) used especially as a fertilizer and explosive [syn: potassium
           nitrate, saltpeter, saltpetre, nitre]