ˈrōd.ə(r), -ōtə- noun
( -s )
Etymology: short for rotator
1. : a part that revolves in a stationary part: as
a. : the rotating member of an electrical machine
b. : the rotating wheel or group of wheels in a steam turbine — compare stator
2. : a revolving vertical cylinder of a rotor ship
3. : a complete system of rotating airfoils that supplies all or a major part of the lift supporting an aircraft
the rotor of a helicopter