Definition of hadrosaur in English:


(also hadrosaurus)


  • A large, herbivorous, mainly bipedal dinosaur of the middle to late Cretaceous period, with jaws flattened like the bill of a duck.

    • ‘There is a parallel here with the hadrosaur and ceratopsian dinosaurs of the Late Cretaceous.’
    • ‘The ornithopods included the hadrosaurs or duck-billed dinosaurs, in which the front of the mouth was enlarged to form a broad flat beak and a variety of bony crests were developed on top of the head.’
    • ‘The Ornithopoda included the hadrosaurs, the iguanodontids, the heterodontosaurs, the hypsilophodontids, and various other dinosaurs.’
    • ‘Samples were taken from hadrosaurs, dinosaurs with exclusively terrestrial life habitats, so that all animals lived in contact with fresh waters.’
    • ‘These tooth marks suggest a diet of largely hadrosaurs and ceratopsians and typically occur more commonly on limb bones than on vertebrae.’


Late 19th century: from modern Latin Hadrosaurus (genus name), from Greek hadros thick, stout + sauros lizard.