[smew] n [akin to MHG smiehe smew] (1674): a small Eurasian merganser (Mergus albellus) with the male being white, gray, and black and the female chiefly gray but with a chestnut and white head
SMEW
Meaning of SMEW in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012