bluebill Meaning, Definition & Usage

  1. noun diving ducks of North America having a bluish-grey bill
    scaup duck; scaup; broadbill.

WordNet

Blue"bill` noun
Definitions
  1. (Zoöl.) A duck of the genus Fuligula. Two American species (F. marila and F. affinis) are common. See Scaup duck.

Webster 1913