From Longman Dictionary of Contemporary Englishpropellerpro‧pel‧ler /prəˈpelə $ -ər/ noun [countable] 
TTATTWa piece of equipment consisting of two or more blades that spin around, which makes an aircraft or ship move
TTATTWa piece of equipment consisting of two or more blades that spin around, which makes an aircraft or ship moveExamples from the Corpus
propeller• Most impressive is probably the Mustang nose and propeller at what once was the entrance to Steeple Morden.• This indicated that neither of the two four-bladed propellers had disintegrated in flight.• He sat there looking at the dead propeller all the way to Cleveland.• The following advice applies to normally-aspirated engines driving fixed-pitch propellers.• Three hundred seventy propellers were replaced.• One aircraft was fitted with a R-1340 geared engine and a three-bladed constant speed propeller with spinner.• Investigators blamed a crack in the propeller.• Designer William Towns rides the Waterbike, propeller driven in various configurations. 