plural of tropical fish

plural of tropical ulcer

A chronic ulcerative skin lesion, common in tropical climates, thought to be caused by polymicrobial infection by various microorganisms, including mycobacteria.

(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.

(biochemistry) A hormone that regulates the activity of the endocrine glands

(geography) The parallel of latitude 23°30′south of the equator, marking the southern boundary of the tropics; the sun is directly overhead at the December solstice.

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.

(geography) The parallel of latitude 23°30′north of the equator, marking the northern boundary of the tropics; the sun is directly overhead at the June solstice.

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