'Hadrosaurus' definitions:
Definition of 'hadrosaurus'
(from WordNet)
noun
Any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic [syn: hadrosaur, hadrosaurus, duck-billed dinosaur]
Definition of 'Hadrosaurus'
From: GCIDE
- Hadrosaurus \Had`ro*sau"rus\ (h[a^]d`r[-o]*s[add]"r[u^]s), n. [NL., fr. Gr. "adro`s thick + say^ros lizard.] (Paleon.) An American herbivorous dinosaur of great size, allied to the iguanodon. It is found in the Cretaceous formation. [1913 Webster]