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ornithischia |
1 definition found From WordNet r 1.6 [wn]: Ornithischia n : extinct terrestrial reptiles having birdlike pelvises: armored dinosaurs (thyreophorans); bone-headed and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods) [syn: {Ornithischia}, {order Ornithischia}]
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