sea duck
noun
1- any of a number of ducks that frequent the sea, especially the eiders, scoters, and long-tailed duck海鸭（尤指绒鸭、海番鸭、长尾鸭）。
1.1
- Tribes Somateriini (and Mergini), family Anatidae: several genera.绒鸭族（和秋沙鸭族）, 鸭科：数种。