Meaning : Mechanical device attached to an elevated structure. Rotates freely to show the direction of the wind.
Synonyms : weather vane, weathervane, wind vane
Meaning : A fin attached to the tail of an arrow, bomb or missile in order to stabilize or guide it.
Meaning : Flat surface that rotates and pushes against air or water.
Synonyms : blade
Meaning : The flattened weblike part of a feather consisting of a series of barbs on either side of the shaft.
Synonyms : web