a. Having a bill like that of a duck; as, a duck-billed dinosaur.. [ 1913 Webster ]
adj. 1. having a beak resembling that of a duck. Syn. -- duckbill, duckbilled. [ WordNet 1.5 ]
a. same as Duck Mole, under Duck.. Syn. -- duck mole, duckbill, duck-bill platypus, platypus. [ PJC ]