1. [ noun ] (zoology) primitive fish of the Mississippi valley having a long paddle-shaped snout
Synonyms: Polyodon_spathula paddlefish
Related terms: ganoid Polyodon
2. [ adjective ] having a beak resembling that of a duck
Synonyms: duck-billed

"a duck-billed dinosaur"

Related terms: beaked
3. [ noun ] (zoology) 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: duckbilled_platypus duck-billed_platypus Ornithorhynchus_anatinus platypus
Related terms: monotreme Ornithorhynchus
Similar spelling:   duck-billed