cyclone

Noun
  1. (meteorology) rapid inward circulation of air masses about a low pressure center;
    Circling counterclockwise in the northern hemisphere and clockwise in the southern (synset 114544904)
    referred to in: meteorology - the earth science dealing with phenomena of the atmosphere (especially weather)
    is a type of: atmosphere, atmospheric state - the weather or climate at some place
    has: depression, low - an air mass of lower pressure; often brings precipitation
  2. A violent rotating windstorm (synset 111463817)
    is a type of: windstorm - a storm consisting of violent winds
    subtypes:
    • hurricane - a severe tropical cyclone usually with heavy rains and winds moving at 63-136 knots (12 on the Beaufort scale)
    • tornado, twister - a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground
    • typhoon - a tropical cyclone occurring in the western Pacific or Indian oceans

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