n.
Pronunciation: ˌ o ̇ r-n ə - ' this-k ē - ə n
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