hesperornis

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

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