| titanosaur | (n) amphibious quadrupedal herbivorous dinosaur with a long thin neck and whiplike tail; of the Cretaceous mostly in the southern hemisphere, Syn. titanosaurian |
| titanosauridae | (n) herbivorous dinosaurs of the Cretaceous, Syn. family Titanosauridae |
| titanosaurus | (n) genus of herbivorous dinosaurs flourishing during the Cretaceous in South America, Syn. genus Titanosaurus |