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| a momentary brightness | |||
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| a sudden intense burst of radiant energy | |||
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| the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash); can scintillate for a second or more | |||
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| a very short time (as the time it takes the eye to blink or the heart to beat) | |||
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| abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light |