First Known Use: 1933
Dictionary
ornithischian
noun or·nith·is·chi·an \ˌȯr-nə-ˈthis-kē-ən\
Definition of ORNITHISCHIAN
: 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
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Origin of ORNITHISCHIAN
New Latin Ornithischia, from ornith- + ischium
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