Main Entry:

or·nith·is·chi·an

Pronunciation:

\ˌȯr-nə-ˈthis-kē-ən\

Function:

noun

Etymology:

New Latin Ornithischia, from ornith- + ischium

Date:

1933

: 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

— ornithischian adjective