1. plural of ankylosaur; a group of herbivorous dinosaurs with heavily armored bodies, club-like tails, and bony plates covering their skin, living during the Cretaceous period.
Usage: paleontology; plural form

Examples

• Ankylosaurs were among the most heavily protected dinosaurs that ever lived.
• The fossil record shows that ankylosaurs thrived in many parts of the world during the Cretaceous.
• Unlike the fast-moving raptors, ankylosaurs moved slowly but were nearly impossible to attack.
• Scientists study ankylosaurs to understand how armor evolved in dinosaurs.
• Some ankylosaurs had tail clubs that could deliver powerful defensive blows.
• Ankylosaurs were herbivores that fed on low-growing plants and shrubs.