Great Red Spot

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Great Red Spot

n
(Celestial Objects) a large long-lived oval feature, south of Jupiter's equator, that is an anticyclonic disturbance in the atmosphere
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References in periodicals archive ?
The Princess was a cream and brown oval in his lap purrs grading into snores.
Jacko, who is just a year old, is white with a brown head with a brown oval shape edged in white on his forehead.
These cyclic changes typically cause new features to develop in the expanded belt, and in fact we've observed both cyclonic brown ovals and anticyclonic white ovals.