Webster's English Dictionary

Enter the word to look up:

nitrous

ni.trous \'ni--tr*s\ aj [NL nitrosus, fr. L, full of natron, fr. nitrum 
   natron - more at]NITER 1: of, relating to, or containing niter  2: of, 
   relating to, or containing nitrogen esp. with a lower valence than  in 
   corresponding nitric compounds