The Collaborative International Dictionary of English v.0.48:

Sasin \Sa"sin\, n. (Zool.)
   The Indian antelope (Antilope bezoartica syn. Antilope
   cervicapra), noted for its beauty and swiftness. It has
   long, spiral, divergent horns.
   [1913 Webster] Sassaby

The Collaborative International Dictionary of English v.0.48:

Antelope \An"te*lope\ ([a^]n"t[-e]*l[=o]p), n. [OF. antelop, F.
   antilope, from Gr. 'anqo`lops, -lopos, Eustathius,
   "Hexa["e]m.," p. 36, the origin of which is unknown.] (Zool.)
   One of a group of ruminant quadrupeds, intermediate between
   the deer and the goat. The horns are usually annulated, or
   ringed. There are many species in Africa and Asia.
   [1913 Webster]

         The antelope and wolf both fierce and fell. --Spenser.
   [1913 Webster]

   Note: The common or bezoar antelope of India is Antilope
         bezoartica. The chamois of the Alps, the gazelle, the
         addax, and the eland are other species. See Gazelle.
         The pronghorn antelope (Antilocapra Americana) is
         found in the Rocky Mountains. See Pronghorn.
         [1913 Webster]