— hadrosaurian , adj.
/had"reuh sawr'/ , n.
a bipedal dinosaur of the genus Hadrosaurus, belonging to the ornithopod family Hadrosauridae of the late Cretaceous Period, having broad, flat jaws for scooping up water plants.
Also called duck-billed dinosaur .
[ Hadrosaurus (1858) genus name, equiv. to Gk hadr ( ós ) thick, bulky + -o- -O- + saûros -SAUR ]