A rotating component that accelerates fluid outward from a center of rotation, found in devices such as pumps, water jets, washing machines, and agitated tanks.
Something which or someone who impels.
A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump.
The wing of a helicopter or other rotary-wing aircraft.
A type of powerful horizontal-axis atmospheric vortex generated by the interaction of strong winds with mountainous terrain.
A quantity having magnitude, direction, and position.