vane
nounA weathervane.
nounAny of several usually relatively thin, rigid, flat, or sometimes curved surfaces radially mounted along an axis, as a blade in a turbine or a sail on a windmill, that is moved by or used to move a fluid.
nounThe flattened, weblike part of a feather, consisting of a series of barbs on either side of the shaft.
nounThe movable target on a leveling rod.
nounA sight on a quadrant or compass.
nounOne of the metal guidance or stabilizing fins attached to the tail of a bomb or other missile.
nounA flag or pennon.β
nounA weathercock; a device which is moved by the wind in such a manner as to show the wind’s direction; a weathervane.
nounA device used on shipboard to answer the purpose of a weathercock: generally called