n. plOdontornithes(Paleon) A group of Mesozoic birds having the jaws armed with teeth, as in most other vertebrates. They have been divided into three orders: Odontolcæ, Odontotormæ, and Saururæ.
Century Dictionary and Cyclopedia
odontornithesBirds with teeth; a group of Aves having true teeth implanted in separate sockets or in a continuous groove. All the recognized Odontornithes are of Mesozoic age, but such birds doubtless continued into the Oænozoic period. The Archæopteryx was Jurassic; the other leading genera, Ichthyornis and Hesperornis, were Cretaceous. The latter two form types of two subclasses of birds, Odontotormæ and Odontolcæ, the first-named typifying a third subclass called Saururæ. See cuts under Archæopteryx and Ichthyornis.
Webster's Revised Unabridged Dictionary
NL., fr. Gr. 'odoy`s'odo`ntos, a tooth + , , a bird