Source : Webster's Revised Unabridged Dictionary (1913)

Nitrogenous \Ni*trog"e*nous\, a. (Chem.)
   Of, pertaining to, or resembling, nitrogen; as, a nitrogenous
   principle; nitrogenous compounds.

   {Nitrogenous foods}. See 2d Note under {Food}, n., 1.

Source : WordNet®

nitrogenous
     adj : of or relating to or containing nitrogen