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   rotor

   /ˈrəʊtə/

   noun

   • 1. a hub with a number of radiating aerofoils that is rotated in an approximately horizontal plane to provide the lift for a helicopter or other rotary wing aircraft.
   • 2. the rotating assembly in a turbine.
   • ▪ the armature of an electric motor.
   • ▪ the 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.
   • ▪ the rotating container in a centrifuge.
   • ▪ the rotary winder of a clockwork watch.
   • 3. a large eddy in which the air circulates about a horizontal axis, especially in the lee of a mountain: "a rotor cloud"

   Word Origin late 19th century: formed irregularly from rotator.

   Scrabble Points: 5

   • R

     1

   • O

     1

   • T

     1

   • O

     1

   • R

     1

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