eiderdown

eiderdown

[ahy-der-doun]
noun
1.
down, or soft feathers, from the breast of the female eider duck.
2.
a heavy quilt or comforter, especially one filled with eiderdown.
3.
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:
1765–75; eider + down2

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World English Dictionary
eiderdown (ˈaɪdəˌdaʊn)
 
n
1.  the breast down of the female eider duck, with which it lines the nest, used for stuffing pillows, quilts, etc
2.  a thick warm cover for a bed, made of two layers of material enclosing a soft filling
3.  (US) a warm cotton fabric having a woollen nap

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

eiderdown
1774; see eider + down (n.). Ultimately from Icelandic æðardun, via a Scandinavian source (cf. Dan. ederdunn) or Ger. eiderdon.
Online Etymology Dictionary, © 2010 Douglas Harper
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