eider-duck

eider duck

noun
any of several large sea ducks of the genus Soamateria and allied genera of the Northern Hemisphere, the females of which yield eiderdown.

Origin:
1850–55

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WordNet
eider duck

noun
duck of the northern hemisphere much valued for the fine soft down of the females [syn: eider
WordNet® 3.0, © 2006 by Princeton University.
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