tyrannosaur
- n large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America
- Here come a nosy tyrannosaur and a fan-faced, bilous dilophosaur.
- The male tyrannosaur roared in response.
- The discovery of the tyrannosaur is significant because that family of dinosaurs is believed to be among the closest relatives of modern birds.