"platypuses" in the noun sense
1. platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus
small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet only species in the family Ornithorhynchidae
Source: WordNet® (An amazing lexical database of English)
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