powder down
noun
modified down feathers that continually crumble at the tips, producing a fine powder that forms a bloom on the plumage of certain birds, as pigeons and herons.
Words nearby powder down
powder boy,
powder burn,
powder charge,
powder chest,
powder compact,
powder down,
powder flag,
powder flask,
powder horn,
powder keg,
powder magazine
Example sentences from the Web for powder down
Powder-down feathers are degenerate down-feathers which appear to secrete a dry, waxy kind of powder.
The powder-down patches of the oil bird are upon each side of the rump.
There are several different kinds of feathers—contour feathers, semiplumes, down-feathers, filoplumes and powder-down.