We found 6 dictionaries that define the word duck-billed dinosaurs:

General (5 matching dictionaries)

1. duck-billed dinosaurs: Merriam-Webster
2. duck-billed dinosaurs, duck-billed dinosaurs: Collins English Dictionary
3. duck-billed dinosaurs: Wiktionary
4. Duck-billed dinosaurs: Wikipedia, the Free Encyclopedia
5. duck-billed dinosaurs: TheFreeDictionary.com

Computing (1 matching dictionary)

6. duck-billed dinosaurs: Encyclopedia

(Note: See duck-billed_dinosaur as well.)

Definitions from Wiktionary (duck-billed dinosaur) ▸ noun:  (informal) Any ornithopod dinosaur of the family Hadrosauridae. ▸ Also see duck-billed_dinosaur ▸ Words similar to duck-billed dinosaurs ▸ Usage examples for duck-billed dinosaurs ▸ Idioms related to duck-billed dinosaurs ▸ Wikipedia articles (New!) ▸ Words that often appear near duck-billed dinosaurs ▸ Rhymes of duck-billed dinosaurs ▸ Invented words related to duck-billed dinosaurs