hesperornis

[hes-puh-rawr-nis]

noun

a toothed aquatic bird of the extinct genus Hesperornis, fossils of which are found in rocks of Cretaceous age in Kansas, having the rear legs modified for swimming and reaching a length of more than 4 feet (1.2 meters).

Origin:
< Neo-Latin (1872) < Greek Hésper(os) Hesperus + órnis bird

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hesperornis is always a great word to know.

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a chattering or flighty, light-headed person.

a stew of meat, vegetables, potatoes, etc.

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hesperornis

hes·per·or·nis