pronghorn

noun

1. fleet antelope-like ruminant of western North American plains with small branched horns

   noun.animal

   Synonyms american antelope antilocapra americana prongbuck pronghorn antelope

   Source: WordNet 3.0

2. An American antelope (<i>Antilocapra Americana</i>), 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 <i>cabr&eacute;e</i>, <i>cabut</i>, <i>prongbuck</i>, and <i>pronghorned antelope</i>.

   noun

   Source: webster1913