Nitrum
Pronunciation : Ni"trum
Part of Speech : n.
Etymology : [L., natron. See Niter.] (Old Chem.)
Definition : Defn: Niter. Nitrum flammans Etym: [L., flaming niter] (Old Chem.), ammonium nitrate; -- probably so called because it deflagerates when suddenly heated.
Source : Webster's Unabridged Dictionary, 1913