Definition of eider in English:


Syllabification: ei·der
Pronunciation: /ˈīdər


(also eider duck) (plural same or eiders)
1A northern sea duck, of which the male has mainly black and white plumage with a colored head, and the brown female has soft down feathers that are used to line the nest.
  • Genus Somateria (and Polysticta), family Anatidae: four species, in particular the common eider (S. mollissima)
More example sentences
  • Sea ducks like scoters and eiders are also divers.
  • Both of these types are plentiful on the Cape, as are sea ducks, such as scoters and eiders, viewable from many vantage points.
  • They frequently nest in colonies, often in association with eiders.
1.1 another term for eiderdown.


late 17th century: from Icelandic æthur, from Old Norse æthr.

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