1. Small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
   - platypus, duckbill, duckbilled platypus, Ornithorhynchus anatinus

Derived forms: duck-billed platypuses

Type of: egg-laying mammal, monotreme

Part of: genus Ornithorhynchus, Ornithorhynchus

Encyclopedia: Duck-billed platypus

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