1A hub with a number of radiating airfoils that is rotated in an approximately horizontal plane to provide the lift for a helicopter or other rotary wing aircraft.
2The rotating assembly in a turbine.
- 2.1The armature of an electric motor.
- 2.2The rotating part of the distributor of an internal combustion engine which successively makes and breaks electrical contacts so that each spark plug fires in turn.
- 2.3The rotating container in a centrifuge.
- 2.4The rotary winder of a clockwork watch.
A large eddy in which the air circulates about a horizontal axis, especially in the lee of a mountain.
- ‘a rotor cloud’
Late 19th century formed irregularly from rotator.