The Collaborative International Dictionary of English v.0.48:

Yakin \Ya"kin\, n. (Zool.)
   A large Asiatic antelope (Budorcas taxicolor) native of the
   higher parts of the Himalayas and other lofty mountains. Its
   head and neck resemble those of the ox, and its tail is like
   that of the goat. Called also budorcas.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Budorcas taxicolor
    n 1: large heavily built goat antelope of eastern Himalayan area
         [syn: takin, gnu goat, Budorcas taxicolor]