Ichthyornis
Ichthyornis , noun
[New Latin, from Greek 'ichqy`s, -y`os, a fish + {not transcribed} bird.]
(Paleontology) An extinct genus of toothed birds found in the American Cretaceous formation. It is remarkable for having biconcave vertebra, and sharp, conical teeth set in sockets. Its wings were well developed. It is the type of the order Odontotorma.