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A cyclone is any mass of air that spirals around a low pressure center. It is an organized collection of thunderstorms embedded in a swirling mass of air. In general, both typhoons and hurricanes are tropical cyclones but differ in their locations. The difference between hurricane and typhoon is that tropical cyclones in the west Pacific are called Typhoons and those in the Atlantic and east Pacific Ocean are called Hurricanes. It's the longitude that matters.
The term cyclone is used in the Bay of Bengal and Arabian Sea and the term typhoon is used in the Pacific Ocean north of the equator and west of the International Dateline. The birth of a hurricane starts as a low pressure zone and builds into a tropical wave of low pressure. In addition to a disturbance in the tropical ocean water, the storms that become hurricanes also require warm ocean waters (above 80Â°F or 27Â°C down to 150 feet or 50 meters below sea level) and light upper level winds.