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Noun: rudder  rú-du(r)
  1. A hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes
     
  2. (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel

Derived forms: rudders

Type of: aerofoil [Brit], airfoil [N. Amer], control surface, steering mechanism, steering system, surface

Part of: vertical tail, vessel, watercraft

Encyclopedia: Rudder