DUCKBILL
duckbill, duck-billed
(adjective) having a beak resembling that of a duck; “a duck-billed dinosaur”
platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus
(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
paddlefish, duckbill, Polyodon spathula
(noun) primitive fish of the Mississippi valley having a long paddle-shaped snout
Source: WordNet® 3.1
Etymology
Noun
duckbill (plural duckbills)
(informal) The duck-billed platypus.
(informal) A hadrosaur.
A fish of the family Percophidae
Percophis brasiliensis (Brazilian flathead).
bull ray (Aetomylaeus bovinus, now Pteromylaeus bovinus).
Source: Wiktionary
Duck"bill`, n. (Zoöl.)
Definition: See Duck mole, under Duck, n.
Source: Webster’s Unabridged Dictionary 1913 Edition