1. Plural of eider; large sea ducks found in northern regions, known for their soft down feathers.
Usage: Typically refers to multiple eider ducks or the species collectively.
2. The soft, fluffy down feathers from eider ducks, used to fill pillows, quilts, and winter clothing.
Usage: Often used in the phrase 'eiderdown' or as a material descriptor.

Examples

• The eiders gathered in large flocks along the Arctic coast.
• Eiders are excellent swimmers and divers in cold ocean waters.
• The museum displayed a collection of eiders preserved from the 19th century.
• Pillows filled with eiders are prized for their warmth and comfort.
• Birdwatchers traveled north to observe the eiders during migration season.
• Traditional eiderdown quilts remain popular in Scandinavian countries.