noun Etymology: Dutch, German, or Swedish, from Icelandic æthur, from Old Norse æthr Date: 1743 any of several large northern sea ducks (genera Somateria and Polystica ) having fine soft down that is used by the female for lining the nest, ~down 1
EIDER
Meaning of EIDER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012