[stylist] friday word: rotor

[vejas]

  rotor noun.  a rotary part of a machine or vehicle, in 
particular: a hub with a number of radiating airfoils that is 
rotated in an approximately horizontal plane to provide the lift 
for a helicopter or autogiro.  the rotating assembly in a 
turbine, especially a wind turbine.  the armature of an electric 
motor.  the rotating part of the distributor of an internal 
combustion engine that successively makes and breaks electrical 
contacts so that each spark plug fires in turn.  the rotating 
container in a centrifuge.