Cite
 

Meaning of Red Spot

Red' Spot"

Pronunciation: [key]
— Astron. Astron.
  1. 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
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.