propeller

n. long shaft with a revolving spiral blades that provide thrust for ships and aircraft

A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a fluid such as water or air, by rotating two or more twisted blades about a central shaft, in a manner analogous to rotating a screw through a solid. The blades of a propeller act as rotating wings (the blades of a propeller are in fact wings or airfoils), and produce force through application of both Bernoulli's principle and Newton's third law, generating a difference in pressure between the forward and rear surfaces of the airfoil-shaped blades and by accelerating a mass of air rearward.
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Noun
1. a mechanical device that rotates to push against air or water
(synonym) propellor
(hypernym) mechanical device
(hyponym) airplane propeller, airscrew, prop
(part-meronym) blade, vane
(derivation) propel, impel

n. propeller, long shaft with a revolving spiral blades that provide thrust for ships and aircraft, screw, metal fastener with a spiral grooved shaft

n. propeller, helix