duckbill

(noun) primitive fish of the Mississippi valley having a long paddle-shaped snout. Synonyms: paddlefish, Polyodon spathula.

(noun) small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae. Synonyms: platypus, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus.

(adj) having a beak resembling that of a duck. Synonyms: duck-billed. Example: "A duck-billed dinosaur."