I. ˌthirēəˈdänch(ē)ə noun plural
Usage: capitalized
Etymology: New Latin, from Greek th ēri- therio- + New Latin -odontia
: a group of extinct reptiles usually considered a suborder of Therapsida but sometimes classified as a separate order that are characterized by teeth which are differentiated into incisors, prominent canines, and molars with numerous cusps and that are known mostly from skulls found in the Permian and Triassic formations of southern Africa
II.
or the·ri·odon·ta ˌthirēəˈdäntə
Etymology: New Latin, from Greek thēri- therio- + New Latin -odontia or -odonta
synonym of pelycosauria