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WordNet-Online 
 Definitions from WordNet
Noun pachycephalosaurus has 1 sense 
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| Definitions from the WebPachycephalosaurusNoun: Pachycephalosaurus refers to a genus of herbivorous dinosaur that lived during the Late Cretaceous period. It is known for its thick skull and dome-shaped head. Example Sentences: 
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| pachamama pachinko pachisi pachouli pachter pachuco pachycephala pachycephalosaur pachycephalosaurus pachycheilia pachyderm pachyderma pachydermal pachydermas pachydermatous pachydermic pachydermous 
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