The Collaborative International Dictionary of English v.0.48:

Aoudad \A"ou*dad\, n. [The Moorish name.] (Zool.)
   An African sheeplike quadruped (the Ammotragus lervia,
   formerly Ammotragus tragelaphus) having a long mane on the
   breast and fore legs; the wild sheep of northern Africa; --
   called also Barbary sheep. It is, perhaps, the chamois of
   the Old Testament.

   Syn: aoudad, arui, Barbary sheep, maned sheep.
        [1913 Webster + WordNet 1.5]