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eider in British English
or eider duck (ˈaɪdə)
noun
any of several sea ducks of the genus Somateria, esp S. mollissima, and related genera, which occur in the N hemisphere. The male has black and white plumage, and the female is the source of eiderdown
Word origin
C18: from Old Norse æthr; related to Swedish ejder, Dutch, German Eidereider in American English
(ˈaɪdər)
nounWord forms: plural ˈeiders or ˈeider
1.
any of several large sea ducks (esp. genus Somateria) that live in northern regions of Europe, Asia, and North America
: often eider duck2.
eiderdown (sense 1)
Word origin
ult. < ON æthar, gen of æthr, eider duckImage ofeider
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