tropical cyclone

Short definition from Wiktionary

Noun

1. 1
   A rapidly rotating storm system characterized by a low-pressure center, strong winds, and a circular or spiral arrangement of thunderstorms that produce heavy rain, ranging in increasing strength from tropical depressions and tropical storm to hurricanes.
2. 2
   A rapidly rotating storm system characterized by a low-pressure center, strong winds, and a circular or spiral arrangement of thunderstorms that produce heavy rain, ranging in increasing strength from tropical depressions and tropical storm to hurricanes: A typhoon; a hurricane.