'Ichthyornis' definitions:

Definition of 'Ichthyornis'

From: GCIDE

Ichthyornis \Ich`thy*or"nis\, n. [NL., fr. Gr. 'ichqy`s, -y`os, a fish + ? bird.] (Paleon.) An extinct genus of toothed birds found in the American Cretaceous formation. It is remarkable for having biconcave vertebr[ae], and sharp, conical teeth set in sockets. Its wings were well developed. It is the type of the order Odontotorm[ae]. [1913 Webster]