Definition of eider
1 : any of several large northern sea ducks (genera Somateria and Polystica) having fine soft down that is used by the female for lining the nest —called also eider duck
2 : eiderdown 1
Did You Know?
There are several species of large diving ducks called eiders. They are heavy and round-bodied, with a humped bill that produces a characteristic sloping profile. Eiders live in the cold far north. They are the source of eiderdown, feathers that the hen plucks from her breast to line her nest and insulate her eggs. Eiderdown is used as a warm filling for jackets, pillows, quilts, and sleeping bags. Hens are mottled brown, but drakes (males) are boldly patterned, with green pigment on the head.
Origin and Etymology of eider
Dutch, German, or Swedish, from Icelandic æthur, from Old Norse æthr
First Known Use: 1743
EIDER Defined for Kids
Definition of eider for Students
: a large duck of northern seas with very soft down
Seen and Heard
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