propeller

1. A mechanical device that rotates to push against air or water (synset 104018203)
   is a type of: mechanical device - mechanism consisting of a device that works on mechanical principles
   subtypes:

   • airplane propeller, airscrew, prop - a propeller that rotates to push against air
   • screw, screw propeller - a propeller with several angled blades that rotates to push against water or air
   • variable-pitch propeller - propeller for which the angle of the blades is adjustable
   has:

   • blade, vane - flat surface that rotates and pushes against air or water
   • hub - the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes
   same as: propellor

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