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diamond ring effect

American

noun

Astronomy.

a phenomenon, sometimes observed immediately before and after a total eclipse of the sun, in which one of Baily's beads is much brighter than the others, resembling a diamond ring around the moon.

Example Sentences

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As the deepest lunar valley passes across the face of the sun, the last ray of light flares out through it, creating what is called the diamond ring effect.

From Salon • Aug. 19, 2017

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023