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)
Order Thecodontia, subdivision Archosauria 槽齿目,古龙亚门
语源
mid 19th cent.: from modern Latin Thecodontia, from Greek thēkē 'case' + odous, odont- 'tooth'