| 单词 | pelycosaur |
| 释义 | pelycosaur(ˈpɛlɪkəʊˌsɔː) noun any extinct mammal-like reptile of the order Pelycosauria, of Upper Carboniferous to Lower Permian times, from which the therapsids are thought to have evolved Word origin C19: from New Latin Pelycosauria, from Greek pelyx bowl, pelvis, + -saur |
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