Adjective duckbill has 1 sense
  1. duckbill, duck-billed - having a beak resembling that of a duck; "a duck-billed dinosaur"
    Antonym: beakless (indirect, via beaked)
,Noun duckbill has 2 senses
  1. paddlefish, duckbill, Polyodon spathula - primitive fish of the Mississippi valley having a long paddle-shaped snout
    --1 is a kind of ganoid, ganoid fish
    --1 is a member of Polyodon, genus Polyodon
  2. 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
    --2 is a kind of monotreme, egg-laying mammal
    --2 is a member of Ornithorhynchus, genus Ornithorhynchus
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