EIDER n.
so eider duck. The American eider (S. Dresseri), the king eider (S. spectabilis), and the spectacled eider (Arctonetta Fischeri) are related species. Eider down. Etym: [Cf. Icel. æ\'ebardun, Sw. eiderdun, Dan. ederduun.] Down of the eider duck, much sought after as an article of luxury.