1. Ornithischia (order of herbacious dinosaurs with bird-like pelvic structures)
Wikipedia definition
2. OrnithischiaOrnithischia or Predentata is an extinct order of beaked, herbivorous dinosaurs. The name ornithischia is derived from the Greek ornitheos (ορνιθειος) meaning 'of a bird' and ischion (ισχιον) meaning 'hip joint'. They are known as the 'bird-hipped' dinosaurs because of their bird-like hip structure, even though birds actually descended from the 'lizard-hipped' dinosaurs. Being herbivores that sometimes lived in herds, they were more numerous than the saurischians.
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