Noun scaup duck has 1 sense
  1. scaup, scaup duck, bluebill, broadbill - diving ducks of North America having a bluish-gray bill
    --1 is a kind of duck
    --1 is a member of Aythya, genus Aythya
    --1 has particulars:
     greater scaup, Aythya marila; lesser scaup, lesser scaup duck, lake duck, Aythya affinis
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