1. a heavily armored herbivorous dinosaur of the Cretaceous period, characterized by bony plates and spikes covering its body and a club-like tail
Usage: paleontology; often used in educational and scientific contexts

Examples

• The ankylosaur was one of the most well-protected dinosaurs, with armor plating covering its entire body.
• Scientists discovered a new species of ankylosaur in the fossil record last year.
• Unlike the T-rex, the ankylosaur was a peaceful herbivore that ate plants.
• The ankylosaur's tail club could be used as a defensive weapon against predators.
• Museum exhibits often feature ankylosaur skeletons to show children how dinosaurs adapted to their environment.
• Ankylosaurs thrived during the Cretaceous period before the mass extinction event.