thecodont
/ˈθiːkədɒnt/noun
1- a fossil quadrupedal or partly bipedal reptile of the Triassic period, having teeth fixed in sockets in the jaw. Thecodonts are ancestral to the dinosaurs and other archosaurs.槽齿爬行动物（为恐龙和其他古蜥的祖先）。
1.1
- Order Thecodontia, subdivision Archosauria.槽齿目, 古龙亚门。
词源
mid 19th cent.: from modern Latin Thecodontia, from Greek thēkē 'case' + odous, odont- 'tooth'.