1. (

• paddlefish ,
• duckbill ,
• Polyodon_spathula

) primitive fish of the Mississippi valley having a long paddle-shaped snout ;

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 ;

1. (

• duckbill ,
• duck-billed

) having a beak resembling that of a duck; "a duck-billed dinosaur" ;