Noun has 2 senses

• duckbill(n = noun.animal) paddlefish, polyodon spathula - primitive fish of the Mississippi valley having a long paddle-shaped snout;



• duckbill(n = noun.animal) duck-billed platypus, duckbilled platypus, ornithorhynchus anatinus, platypus - small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae;

Adjective has 1 sense

• duckbill(s = adj.all) duck-billed - having a beak resembling that of a duck; "a duck-billed dinosaur"