Definitions for eiderˈaɪ dər
Random House Webster's College Dictionary
Ref: eider duck.
Origin of eider:
1735–45; < Icel æthar (in 18th-cent. sp. ædar), gen. sing. of æthur eider duck
eider, eider duck(noun)
duck of the northern hemisphere much valued for the fine soft down of the females
Any species of sea duck of the genera Polysticta or Somateria, which lines its nest with fine down (taken from its own body).
A river in Germany, the boundary between Schleswig and Holstein.
Origin: From æðar, genitive of æðr, probably reaching English via eider (now ejder).
any species of sea duck of the genus Somateria, esp. Somateria mollissima, which breeds in the northern parts of Europe and America, and lines its nest with fine down (taken from its own body) which is an article of commerce; -- called also eider duck. The American eider (S. Dresseri), the king eider (S. spectabilis), and the spectacled eider (Arctonetta Fischeri) are related species