Any of three species of small diving duck in the genus Aythya. / (Scotland) Alternative form of scalp (“a bed or stratum of shellfish”)

plural of scaup

A scaup of the species Aythya marila, a bluebill.

plural of greater scaup

A scaup of the species Aythya affinis.

plural of lesser scaup

A duck of the Anatinae subfamily endemic to New Zealand; Aythya novaeseelandiae.

plural of New Zealand scaup

plural of scauper

A tool with a semicircular edge, used by engravers to clear away the spaces between the lines of an engraving.