a. Having the form of a duck's bill. [ 1913 Webster ]
Duck's-bill limpet (Zool.), a limpet of the genus Parmaphorus; -- so named from its shape. [ 1913 Webster ]
n. (Bot.) The May apple (Podophyllum peltatum). [ 1913 Webster ]
{ , n. (Bot.) Duckweed. [ 1913 Webster ]