synapsid
/saɪˈnæpsɪd/noun
1- a fossil reptile of a Permian and Triassic group, the members of which show increasingly mammalian characteristics and include the ancestors of mammals下孔亚纲的爬行动物。亦称MAMMAL-LIKE REPTILE.
1.1
- Subclass Synapsida; includes the pelycosaurs and the therapsids.下孔亚纲; 包括盘龙目和兽孔。
词源
early 20th cent.: from modern Latin Synapsida, from Greek sun- 'together' + apsis, apsid- 'arch'.