The Collaborative International Dictionary of English v.0.48:

arui \arui\ n.
   1. a wild sheep (Ammotragus lervia) of northern Africa,
      having a thick mane on the throat, chest, and forelegs; --
      also called the aoudad and Barbary sheep.

   Syn: aoudad, audad, Barbary sheep, maned sheep.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

arui
    n 1: wild sheep of northern Africa [syn: aoudad, arui,
         audad, Barbary sheep, maned sheep, Ammotragus
         lervia]