Learn how to say Ornithischians correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word ornithischian:
relating to or denoting herbivorous dinosaurs of an order distinguished by having a pelvic structure resembling that of birds. Compare with saurischian.
an ornithischian dinosaur.
Order Ornithischia, superorder Dinosauria; comprises the stegosaurs, ankylosaurs, ornithopods, pachycephalosaurs, and ceratopsians
early 20th century: from modern Latin Ornithiscia, from Greek ornis, ornith- ‘bird’ + iskhion ‘hip joint’