Source : Webster's Revised Unabridged Dictionary (1913)

Tzarina \Tza*ri"na\, Tzaritza \Tza*rit"za\, n.
   The empress of Russia. See {Czarina}.

Source : WordNet®

tzarina
     n : the wife or widow of a czar [syn: {czarina}, {tsarina}, {czaritza},
          {tsaritsa}]