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]

The Collaborative International Dictionary of English v.0.48:

Budorcas \Budorcas\ n.
   a genus of mammals comprising the gnu goats.

   Syn: genus Budorcas.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Budorcas
    n 1: gnu goats [syn: Budorcas, genus Budorcas]