1. a large carnivorous dinosaur with powerful hind legs, small front legs, and a long tail that lived during the Late Jurassic period
Usage: paleontology

Examples

• The allosaurus was one of the most fearsome predators of its time.
• Scientists discovered a nearly complete allosaurus skeleton in Colorado.
• The museum’s allosaurus exhibit shows how the dinosaur hunted its prey.
• An adult allosaurus could grow up to 32 feet in length.
• The allosaurus had sharp, serrated teeth perfect for tearing flesh.
• Fossil evidence suggests the allosaurus lived about 155 million years ago.