A mechanical device used for winnowing grain.

Any structure, such as a leaf or the tail of a bird, resembling an open fan.

Volume of space periodically energized by a radar beam (or beams) repeatedly traversing an established pattern.

A gently sloping, fan-shaped feature usually found near the lower termination of a canyon.

1. A device, usually consisting of a rotating paddle wheel or an airscrew, with or without a casing, for producing currents in order to circulate, exhaust, or deliver large volumes of air or gas.

2. A vane to keep the sails of a windmill facing the direction of the wind.