hadrosaurus Meaning, Definition & Usage

  1. noun any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
    duck-billed dinosaur; hadrosaur.

WordNet

Had`ro*sau"rus noun
Etymology
NL., fr. Gr. "adro`s thick + say^ros lizard.
Definitions
  1. (Paleon.) An American herbivorous dinosaur of great size, allied to the iguanodon. It is found in the Cretaceous formation.

Webster 1913