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Noun: cyclone  sI-klown
  1. (meteorology) rapid inward circulation of air masses about a low pressure centre; circling counterclockwise in the northern hemisphere and clockwise in the southern
     
  2. A violent rotating windstorm
    - tornado

Derived forms: cyclones

Type of: atmosphere, atmospheric state, windstorm

Antonym: anticyclone

Encyclopedia: Cyclone, Pennsylvania