noun Date: 1606 the soft downy feathers of the swan often used as trimming on articles of dress, a heavy cotton flannel that has a thick nap on the face and is made with sateen weave
SWANSDOWN
Meaning of SWANSDOWN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012