Noun: pliosaur 'plI-u,sor
- A large marine reptile of the Jurassic and Cretaceous periods, characterized by a short neck, large head, and powerful flippers; typically reaching lengths of 10-15 meters and known as apex predators of their time
"Fossils of pliosaurs have been found on every continent"
Derived forms: pliosaurs
Encyclopedia: Pliosaur