Hesperornithiformes

plural noun

Hes·​per·​or·​nith·​i·​for·​mes

ˌhespə(ˌ)rȯrˌnithəˈfȯrˌmēz

: an order of extinct aquatic birds (superorder Odontognathae) including the genus Hesperornis and related Cretaceous forms

Word History

Etymology

New Latin, from Hesperornith-, Hesperornis + -iformes

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