contrarotating propeller

contrarotating propeller
\\|kän.trə+...-\ noun
Etymology: contra- + rotating
: one of a pair of propellers (as on a ship or airplane) mounted on concentric shafts, having a common drive, and turning in opposite directions to reduce the torque reaction

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contrarotating propeller /kon-trə-rō-tāˈting prə-pelˈər/
One of a pair of propellers rotating in opposite directions (also contrapropellˈer)

Useful english dictionary. 2012.

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