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n. pl. scaup or scaups
1. Either of two diving ducks (Aythya marila or A. affinis) of the Northern Hemisphere, the male of which has gray, black, and white plumage. Also called bluebill.
2. A small diving duck (Aythya novaeseelandiae) of New Zealand, having dark plumage.
[Short for scaup-duck, perhaps from Scots scalp, scaup, bed of mussels (from its feeding on shellfish).]
(Animals) either of two diving ducks, Aythya marila (greater scaup) or A. affinis (lesser scaup), of Europe and America, having a black-and-white plumage in the male. Also called (US): bluebill or broadbill
[C16: Scot variant of scalp]
any of several diving ducks of the genus Aythya, esp. A. marila, of the Northern Hemisphere, having a bluish gray bill.
[1665–75; by ellipsis from scaup duck]
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|Noun||1.||scaup - diving ducks of North America having a bluish-grey bill|
duck - small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
Aythya marila, greater scaup - large scaup of North America having a greenish iridescence on the head of the male