Eider
n.
Any species of sea duck of the genus Somateria , esp. Somateria mollissima , which breeds in the northern parts of Europe and America, and lines its nest with fine down (taken from its own body) which is an article of commerce; -- called also eider duck . The American eider ( S. Dresseri ), the king eider ( S. spectabilis ), and the spectacled eider ( Arctonetta Fischeri ) are related species.
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