smew noun. [smju:] L17.
[Obscurely rel. to Dutch smient, smeente, Low German smēnt wigeon, German Schmeiente, Schmi-, Schmü- small wild duck (from Ente duck).]
A medium-sized Eurasian saw-billed duck, Mergus albellus, having grey and white plumage with the head red-brown and white, or in the breeding male, black and white. Also called white merganser.
red-headed smew: see RED adjective.

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