Source : Webster's Revised Unabridged Dictionary (1913)

Euornithes \Eu`or*ni"thes\, n. pl. [NL., fr., Gr. ? well + ?, ?
   a bird.] (Zo["o]l.)
   The division of Aves which includes all the typical birds, or
   all living birds except the penguins and birds of ostrichlike
   form.