| 单词 | plesiosaur |
| 释义 | plesiosaur —plesiosauroid, adj. /plee"see euh sawr'/, n. any marine reptile of the extinct genus Plesiosaurus, from the Jurassic and Cretaceous periods, having a small head, a long neck, four paddlelike limbs, and a short tail. [ < NL Plesiosaurus (1821), equiv. to Gk plesí(os) near, close to + -o- -O- + saûros -SAUR; orig. so named because of its conjectured nearness to modern reptiles, relative to the ichthyosaurs] |
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