thecodont

Any of various extinct early archosaurs that existed in the Permian and Triassic Periods and had teeth set in sockets rather than attached directly to the jaw. The group Thecodontia in which they were once placed is no longer in scientific use.

Having the teeth lodged in alveoli: said of certain Lacertilia, as distinguished from those whose dentition is acrodont or pleurodont.

A thecodont lizard.

One of the Thecodontia.

Having the teeth inserted in sockets in the alveoli of the jaws.

Of or pertaining to the thecodonts.

Any of the Thecodontia (a former group of archosaurs).

presumably in the common ancestral line to dinosaurs and crocodiles and birds