mechanical device attached to an elevated structure; rotates freely to show the direction of the wind

[ Syn: weathervane , weather vane , wind vane ]

a fin attached to the tail of an arrow, bomb or missile in order to stabilize or guide it

flat surface that rotates and pushes against air or water

[ Syn: blade ]

the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft

[ Syn: web ]