The Collaborative International Dictionary
marco polo sheep \marco polo sheep\, marco polo's sheep \marco polo's sheep\n. An Asiatic wild sheep ( Ovis poli) with exceptionally large horns; sometimes considered a variety of the argali: Ovis ammon poli.
Argal \Ar"gal\, ||Argali \Ar"ga*li\, n. [Mongolian.] (Zo["o]l.) A species of wild sheep ( Ovis ammon, or Ovis 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. [1913 Webster] ||
Usage examples of "ovis ammon".
You were not supposed to use a bow longer than your own height, for it was considered that by doing so you were expending unnecessary energy, rather like using an elephant-gun, to shoot an ovis ammon with.