\Hes`pe*ror"nis\, n. [NL., fr. Gr. ? western + ?, ?,
a bird.] (Paleon.)
A genus of large, extinct, wingless birds from the Cretaceous
deposits of Kansas, belonging to the Odontornithes. They had
teeth, and were essentially carnivorous swimming ostriches.
Several species are known. See Illust. in Append.