Learn how to say Eider correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word eider:
noun (plural same or eiders)
a northern sea duck, of which the male is mainly black-and-white with a coloured head, and the female brown.
Genus Somateria (and Polysticta), family Anatidae: four species
late 17th century: from Icelandic æthur, from Old Norse æthr