Definition of ornithischian in English:

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Pronunciation: /ˌôrnəˈTHiskēən/


Relating to or denoting herbivorous dinosaurs of an order distinguished by having a pelvic structure resembling that of birds. Compare with saurischian.
Example sentences
  • The University of California Museum of Paleontology is proud to present displays of ornithischian dinosaurs.
  • Meanwhile, the much smaller ornithischian dinosaurs - the ornithopods and stegosaurs - browsed on the undergrowth.
  • The williams Fork Formation preserves a diverse dinosaur fauna containing at least nine saurischian and five ornithischian species.


An ornithischian dinosaur.
Example sentences
  • The reasons for the extreme rarity of ornithischians in the Lower Jurassic of China are unclear at present.
  • The thyreophorans are the armored ornithischians: the stegosaurs and ankylosaurs.
  • A number of interesting structural adaptations were developed within the ornithischians.


Early 20th century: from modern Latin Ornithiscia, from Greek ornis, ornith- 'bird' + iskhion 'hip joint'.

For editors and proofreaders

Syllabification: or·nith·is·chi·an

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