eiderdown
noun uk/ˈaɪ.də.daʊn/ us/ˈaɪ.dɚ.daʊn/ (US comforter)
[ C ]鸭绒垫，鸭绒被
a thick covering for the top of a bed, filled with soft feathers or warm material
She snuggled beneath the eiderdown. 她舒适地蜷伏在鸭绒被下面。
Compare: duvet
[ U ]鸭绒
the soft feathers of a duck, used for filling pillows, bed covers, etc.