cyclone Definition

cyclone
noun

1. meteorol.
An area of low atmospheric pressure, often associated with stormy weather, in which winds spiral inward towards a central low, blowing in an anticlockwise direction in the northern hemisphere and a clockwise direction in the southern hemisphere. Compare anticyclone.
Form: depression (also)
Form: low
2. A violent tropical storm accompanied by torrential rain and extremely strong winds, often causing widespread destruction.

Thesaurus: hurricane, tornado, typhoon, twister, tempest, monsoon.

Derivative: cyclonic
adj

Derivative: cyclonically
adverb

Etymology: 19c: from Greek kyklon a whirling round.