What is the meaning of the word "hadrosaur"?

Definitions:

  1. Refers to a group of herbivourous dinosaurs known for their distinctive duck-billed appearance. copy to clipboard NOUN
    • Fossilized footprings of hadrosaurs indicate they moved in herds. copy to clipboard
  2. Type of dinosaur that lived during the Late Cretaceous period and notable for their complex dental structures and elaborate cranial crests. copy to clipboard NOUN
    • The elaborate crest of the hadrosaur might have been used to produce sounds for communication. copy to clipboard

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