Definitions for "Cyclones"
depressions, or areas of low pressure, associated with rising warm air and clockwise air circulation (anticlockwise in northern hemisphere. A tropical cyclone is an intense depression fed by very warm (over 27oC) waters, and by latent heat energy release in condensation. The wind is given its swirl by the Coriolis effect.
Another name for a hurricane, primarily used in the Indian and South Pacific Oceans.