The Collaborative International Dictionary of English v.0.48:

Dziggetai \Dzig"ge*tai\, n. (Zool.)
   The kiang, a wild horse or wild ass of Tibet (Asinus
   hemionus).
   [1913 Webster]

   Note: The name is sometimes applied also to the koulan or
         onager. See Koulan.

WordNet (r) 3.0 (2006):

dziggetai
    n 1: Mongolian wild ass [syn: chigetai, dziggetai, Equus
         hemionus hemionus]