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Entry 1 sense Webster, 1913

Bluebill

· Blue·bill · IPA /ˈbluˌbɪl/
01 n. A duck of the genus Fuligula. Two American species (Fuligula marila and Fuligula affinis) are common. See Scaup duck.
  1. 1.
    A duck of the genus Fuligula. Two American species (Fuligula marila and Fuligula affinis) are common. See Scaup duck.(Zool.) See: Scaup duck