eider duck eider down • eider yarn · · · Info · Definitions · Synonyms · Characters · · eider duck · · Text Common · · Latin · · Scripts 10 · · Length 4 · · Syllables Definitions · · · (noun) duck of the northern hemisphere much valued for the fine soft down of the females. Synonyms: eider, eider duck. · · Noun Definition 1 Synonyms · · · eider · · Synonym 1 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B r latin small letter r U+0072 u latin small letter u U+0075