a northern sea duck, of which the male has mainly black-and-white plumage with a coloured head, and the brown female has soft down feathers which are used to line the nest 绒鸭,绵凫
Genus Somateria (and Polysticta), family Anatidae: four species, in particular the common eider (S. mollissima) 绒鸭属,鸭科: 4种,尤指欧绒鸭(拉丁名S. mollissima) ■(亦作 eider down)[mass noun]small, soft feathers from the breast of the female eider duck 绒鸭绒,绒鸭绒毛
语源
late 17th cent.: from Icelandic æthur, from Old Norse æthr