名詞 eider:

1. duck of the northern hemisphere much valued for the fine soft down of the females
   同義詞：eider duck

ei.der

n.（名詞）
Any of several large sea ducks, especially of the genusSomateria of northern regions, having soft, commercially valuable down and predominantly black and white plumage in the male.
絨鴨：一種大海鴨，尤指北部地區(qū)的歐絨鴨 屬，有柔軟的有商業(yè)價值的鴨絨，雄鴨毛主要為黑白色

來源：
Ultimately from Old Norse ôdhar [genitive of] ôdhr
最終源自 古斯堪的納維亞語 ôdhar [] ôdhr的所有格