| 单词 | hesperornis |
| 释义 | hesperornis /hes'peuh rawr"nis/, n. 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 ft. (1.2 m). [ < NL (1872) < Gk Hésper(os) HESPERUS + órnis bird] |
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