Propulsor

A propulsor is a mechanical device that gives propulsion. The word is commonly used in the marine vernacular, and implies a mechanical assembly that is more complicated than a propeller. The Kort nozzle and pump-jet are examples. An example propulsor is shown in the accompanying picture. It has a shroud which cuts down on blade-tip cavitation and ...
Found on http://en.wikipedia.org/wiki/Propulsor

propulsor

(from the article `jet engine`) The gas horsepower generated by the prime mover in the form of hot, high-pressure gas is used to drive the propulsor, enabling it to generate thrust ...
Found on http://www.britannica.com/eb/a-z/p/122
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