Hesperornis
noun
Hes·per·or·nis
ˌhespəˈrȯrnə̇s
: a genus of swimming birds (order Hesperornithiformes) from the Cretaceous of Kansas that resemble loons in form, that have teeth in each jaw implanted in a long groove, and that in some cases exceed five feet in length
Word History
Etymology
New Latin, from Greek hesperos western + New Latin -ornis