noun
eider
Soft down from an eider used as filling for warmth.
This quilt is filled with eider to keep you warm.
Etymology
The duck’s name is used for the soft down obtained from it. This is a transfer from the animal to the insulating material it supplies.
More examples
- The jacket's eider filling provides warmth without much weight.
- She chooses eider rather than synthetic filling for the comforter.
- The pillow contains a blend of eider and ordinary feathers.
Forms
eider
Similar words
- down
- Covers soft insulating feathers from various birds, not just eiders.
- eiderdown
- Names the same filling more explicitly as the duck's down.