Source : Webster's Revised Unabridged Dictionary (1913)

Broadbill \Broad"bill`\, n.
   1. (Zo["o]l.) A wild duck ({Aythya, or Fuligula, marila)},
      which appears in large numbers on the eastern coast of the
      United States, in autumn; -- called also {bluebill},
      {blackhead}, {raft duck}, and {scaup duck}. See {Scaup
      duck}.

   2. (Zo["o]l.) The shoveler. See {Shoveler}.

Source : WordNet®

broadbill
     n 1: tropical American heron related to night herons [syn: {boatbill},
           {boat-billed heron}, {Cochlearius cochlearius}]
     2: diving ducks of North America having a bluish-gray bill
        [syn: {scaup}, {scaup duck}, {bluebill}]
     3: freshwater duck of the northern hemisphere having a broad
        flat bill [syn: {shoveler}, {shoveller}, {Anas clypeata}]
     4: small birds of the Old World tropics having bright plumage
        and short wide bills