large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; Upper Cretaceous; North America.

• 大型食肉两足恐龙，巨大的牙齿上有刀一样的锯齿；可能算是食腐动物更胜于一个主动的食肉动物；上白垩纪；北美洲。