Definitions:

1. A family of duck-billed dinosaurs that lived during the late Cretaceous period. NOUN
   • The Hadrosauridae family is known for their distinctive duck-billed snouts, which helped them efficiently graze on plants.
2. Herbivorous dinosaurs characterized by their flat duck-like snouts and long tails, noted for their unique dentition, featuring numerous closely spaced teeth ideal for grinding plant matter. NOUN
   • The Hadrosauridae were among the most common herbivorous dinosaurs of the late Cretaceous period.

Synonyms:

• duck-billed dinosaurs
• hadrosaurids
• herbivorous dinosaurs
• ornithopods