hadrosauridae

from WordNet (r) 3.0 (2006)

Hadrosauridae
    n 1: duck-billed dinosaurs; upper Cretaceous [syn:
         {Hadrosauridae}, {family Hadrosauridae}]

from The Collaborative International Dictionary of English v.0.48

Hadrosauridae \Hadrosauridae\ prop. n.
   A natural family of extinct reptiles including the
   duck-billed dinosaurs.

   Syn: family {Hadrosauridae}.
        [WordNet 1.5]