titanosaur, titanosaurian

amphibious quadrupedal herbivorous dinosaur with a long thin neck and whiplike tail; of the Cretaceous mostly in the southern hemisphere

• genus Argentinosaurus — enormous dinosaur of the middle Cretaceous found in Argentina

• dinosaur — any of numerous extinct terrestrial reptiles of the Mesozoic era

• Titanosaurus, genus Titanosaurus — genus of herbivorous dinosaurs flourishing during the Cretaceous in South America