Source : Webster's Revised Unabridged Dictionary (1913)

Eurhipidurous \Eu*rhip`i*du"rous\, a. [Gr. ? well + ? a fan + ?
   a tail.] (Zo["o]l.)
   Having a fanlike tail; belonging to the Eurhipidur[ae], a
   division of Aves which includes all living birds.