natron


From The Collaborative International Dictionary of English v.0.48:

Natron \Na"tron\, n. [F., fr. Sp. natron, Ar. natr[=u]n,
   nitr[=u]n. Cf. Niter, Anatron.] (Min.)
   Native sodium carbonate. [Written also anatron.]
   [1913 Webster]
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