Source : Webster's Revised Unabridged Dictionary (1913)

Half-caste \Half"-caste`\, n.
   One born of a European parent on the one side, and of a
   Hindoo or Mohammedan on the other. Also adjective; as,
   half-caste parents.

Source : WordNet®

half-caste
     n : offspring of parents of different races or cultures