What does "ornithischian" mean?

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

What is a synonym for "ornithischian"?

Common synonyms include: ornithischian dinosaur.

noun

noun ·Rare ·Advanced level

Noun

1
Any of a group of dinosaurs, of the order Ornithischia, that have hips characteristic of birds.
2
herbivorous dinosaur with a pelvis like that of a bird wordnet

From translingual Ornithischia + -an.