What is "antilocapra americana"

Pronghorn \Prong"horn`\, n. (Zo["o]l.) An American antelope ( Antilocapra Americana), native of the plain near the Rocky Mountains. The upper parts are mostly yellowish brown; the under parts, the sides of the head and throat, and the buttocks, are white. The horny sheath of the horns is shed annually. Called also cabr['e]e, cabut, prongbuck, and pronghorned antelope.

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.] (Zo["o]l.) 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.

The antelope and wolf both fierce and fell.
--Spenser.

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.