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English definition of “eiderdown”

eiderdown

noun [C]     /ˈaɪ.də.daʊn/ US  /-dɚ-/
a thick covering for the top of a bed , filled with soft feathers or warm material , used especially in the pastBed linen and covers
(Definition of eiderdown noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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