(in the broad sense) a rapidly rotating storm system characterized by a low-pressure center, strong winds, and a circular/spiral arrangement of thunderstorms that produce heavy rain, ranging in increasing strength from tropical depressions and tropical storm to hurricanes.

The time that it takes for the Sun to return to the same position along the ecliptic, as viewed from the Earth, especially: / A vernal equinox year, the time between two successive vernal equinoxes.

(meteorology) organized low-pressure system of thunderclouds with closed surface circulation and maximum sustained winds of less than 34 knots (63 km) per hour.

(medicine) any infectious disease which occurs only, or more often, in tropical or subtropical regions

Not tropical; not characteristic of or located in the tropics.

A cyclone within the tropics, typically having its thunderclouds organized in a spiral shape with wind speeds on the surface between about 30 and 75 miles (60 - 120 km) per hour.

(mathematics) A recent branch of geometry that can be described as a piecewise linear version of real algebraic geometry.

A particular disease whose major symptom is malabsorption.

A weak aurora above the tropics

plural of tropical storm