noun. Any of various herbivorous dinosaurs of the order Ornithischia, having a pubic bone that points down and backward like that of modern birds, usually a horny beak or bill, and including the hadrosaurs and stegosaurs.

Pertaining to or having the characters of the group of dinosaurs named Ornithischia by Seeley; having the bones of the pelvis like those of a bird.

noun. Any of a group of dinosaurs, of the order Ornithischia, that have hips characteristic of birds

noun. herbivorous dinosaur with a pelvis like that of a bird

"Named Fruitadens haagarorum, this tiny ornithischian was likely an omnivore, like other heterodontosaurids."

dinosaur  

armored dinosaur  bone-headed dinosaur  ceratopsian  duck-billed dinosaur  hadrosaur