a large long-lived oval feature, south of Jupiter's equator, that is an anticyclonic disturbance in the atmosphere
Red Spot in American English
noun
Astronomy
a large, usually reddish gaseous vortex on the surface of Jupiter, about 14,000 by 30,000 km, that drifts about slowly as the planet rotates and has been observed for several hundred years
Also called: Great Red Spot
Word origin
[1875–80]This word is first recorded in the period 1875–80. Other words that entered Englishat around the same time include: authoritarian, fan-tan, graph, knockabout, neoclassic