ornithurous

ornithurous, a. Zool.

(ɔːnɪˈθjʊərəs)

[f. mod.L. Ornithūræ, fem. pl., f. ornitho- + Gr. οὐρά tail.]

lit. Bird-tailed; of or pertaining to the Ornithuræ or ordinary birds having a tail terminated by a pygostyle, as opposed to the Saururæ or lizard-tailed birds, represented by the fossil Archæopteryx.