noun or·nith·is·chi·an \ˌȯr-nə-ˈthi-skē-ən\

Definition of ornithischian

  1. :  any of an order (Ornithischia) of herbivorous dinosaurs (as a stegosaurus) that have the pubis of the pelvis rotated backward to a position parallel and close to the ischium — compare saurischian



Origin and Etymology of ornithischian

New Latin Ornithischia, from ornith- + ischium

First Known Use: 1888

Learn More about ornithischian

Seen and Heard

What made you want to look up ornithischian? Please tell us where you read or heard it (including the quote, if possible).