| 单词 | pelycosaur |
| 释义 | pelycosaur /pel"i keuh sawr'/, n. any of a group of large primitive reptiles belonging to the extinct order Pelycosauria, abundant in North America and Europe during the Permian Period, often having a tall spinal sail. [ < NL Pelycosauria (1878), equiv. to Gk pelyk-, s. of pélyx wooden bowl, cup (taken as meaning PELVIS, parallel to the NL sense of L pelvis) + -o- -O- + saûr(os) -SAUR + NL -ia -IA; so named from the peculiar form of the ischium in such reptiles] |
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