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(Mechanical Engineering) an early form of ship's propeller in which an Archimedes' screw is used to produce thrust by accelerating a flow of water
1. a device having a revolving hub with radiating blades, for propelling an airplane, ship, etc.
2. a person or thing that propels.
3. the bladed rotor of a pump that drives the fluid axially.
4. a wind-driven, usu. three-bladed device that provides mechanical energy, as for driving an electric alternator in wind plants.
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|Noun||1.||screw propeller - a propeller with several angled blades that rotates to push against water or air|
ship - a vessel that carries passengers or freight