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WordNet-Online 
 
Noun ornithischian has 1 sense 
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| ornater ornerier orneriest orneriness ornery orney ornithine ornithischia ornithischian ornithischian dinosaur ornithogalum ornithogalum pyrenaicum ornithogalum thyrsoides ornithogalum umbellatum ornitholestid ornithological ornithologiki 
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