单词 | Pelycosauria |
释义 | Pelycosauriaplural noun Pel·y·co·sau·ria : an order of primitive Permian reptiles (subclass Synapsida) that resemble mammals and often have extreme development of the dorsal vertebral processes compare dimetrodon, edaphosaurus pelycosaurian ¦⸗⸗⸗¦sȯrēən |
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