therapsid
/θɪˈræpsɪd/noun
1- a fossil reptile of a Permian and Triassic order, the members of which are related to the ancestors of mammals兽孔目爬行动物。
1.1
- Order Therapsida, subclass Synapsida: many families and numerous genera, including the cynodonts.兽孔目, 合弓亚纲：多科, 众多属, 包括犬齿兽类。
词源
early 20th cent.: from modern Latin Therapsida, from Greek thēr 'beast' + hapsis, hapsid- 'arch' (referring to the structure of the skull).