Swan's"-down` (?), ∨ Swans"-down`, n.
1.
The down, or fine, soft feathers, of the swan, used on various articles of dress.
2.
A fine, soft, thick cloth of wool mixed with silk or cotton; a sort of twilled fustian, like moleskin.
Swan's-down cotton. See Cotton flannel, under Cotton.
© Webster 1913.