1. a large carnivorous theropod dinosaur of the Jurassic period, known for its powerful hind legs and sharp claws
Usage: paleontology; often used in scientific and educational contexts

Examples

• The allosaur was one of the largest predators of its time.
• Fossils of allosaurs have been found across North America and Europe.
• Unlike the later Tyrannosaurus, the allosaur had three-fingered hands.
• Scientists believe the allosaur hunted large herbivorous dinosaurs.
• The museum's skeleton of an allosaur attracts thousands of visitors each year.