Pelycosaur
volume
British pronunciation/pɛlˈɪkəsˌɔː/
American pronunciation/pɛlˈɪkəsˌɔːɹ/

"pelycosaur"的定义和意义

Pelycosaur
01

large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America

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