I. ˈthē-kə-ˌdänt adjective
Etymology: International Scientific Vocabulary thec- (from New Latin theca ) + -odont
Date: 1840
: having the teeth inserted in sockets
II. noun
Date: 1840
: any of an order (Thecodontia) of Triassic diapsid thecodont reptiles that were presumably on the common ancestral line of the dinosaurs, birds, and crocodiles