Argal \Ar"gal\, Argali \Ar"ga*li\, n. [Mongolian.] (Zo["o]l.) A species of wild sheep ({Ovis ammon}, or {O. argali}), remarkable for its large horns. It inhabits the mountains of Siberia and central Asia. Note: The bearded argali is the aoudad. See {Aoudad}. The name is also applied to the bighorn sheep of the Rocky Mountains. See {Bighorn}.