eiderdown

[ ahy-der-doun ]
/ ˈaɪ dərˌdaʊn /

noun

down, or soft feathers, from the breast of the female eider duck.
a heavy quilt or comforter, especially one filled with eiderdown.
a warm, lightweight knitted or woven fabric of wool, cotton, or man-made fibers, napped on one or both sides, used for sleepwear, infants' clothing, etc.

Origin of eiderdown

First recorded in 1765–75; eider + down2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for eiderdown

British Dictionary definitions for eiderdown

eiderdown

/ (ˈaɪdəˌdaʊn) /

noun

the breast down of the female eider duck, with which it lines the nest, used for stuffing pillows, quilts, etc
a thick warm cover for a bed, made of two layers of material enclosing a soft filling
US a warm cotton fabric having a woollen nap

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012