ornithischia | sense examples, Usage and Definition from wordnet dictionary online

Noun ornithischia has 1 sense

Ornithischia, order Ornithischia - extinct terrestrial reptiles having birdlike pelvises: armored dinosaurs (thyreophorans); bone-headed and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)
--₁ is a kind of animal order
--₁ is a member of Archosauria, subclass Archosauria
--₁ has members:

ornithischian, ornithischian dinosaur; genus Pisanosaurus; genus Staurikosaurus; Thyreophora, suborder Thyreophora, thyreophoran; Marginocephalia, suborder Marginocephalia, marginocephalian; Euronithopoda, suborder Euronithopoda, euronithopod, Ornithopoda, suborder Ornithopoda