smew(redirected from Mergellus)
Also found in: Thesaurus.
A small Eurasian diving duck (Mergellus albellus), the male of which has white and black plumage and a white crest.
[Perhaps akin to earlier and dialectal English smee, any of various duck species; akin to German dialectal schmei-, schmü- (in Schmeiente, Schmünte, widgeon : schmei-, schmü- + German Ente, duck), and to Dutch smient.]
(Animals) a merganser, Mergus albellus, of N Europe and Asia, having a male plumage of white with black markings
[C17: of uncertain origin]
a Eurasian duck, Mergellus albellus, closely akin to mergansers.
[1665–75; orig. uncertain]