impeller

1. Something which or someone who impels.

2. Something which or someone who impels.

   A rotating component of a device that accelerates fluid, increasing its pressure or flowrate.

   screw impeller

3. A rotating component of a device that accelerates fluid, increasing its pressure or flowrate.

   Especially, such a component that drives the fluid radially (outward from a center of rotation) rather than axially. (Impellers are found in devices such as pumps, water jets, washing machines, and agitated tanks.)

   Holonym: torque converter

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