Flashing or sparkling brilliantly; shining with a bright, glittering light.
Present participle of coruscare. Used both as an adjective to describe something that is brightly shining and as a verb form describing the action of coruscating.
A 'coruscating wit' is a person whose intelligence is sharp and brilliant—the word extends beyond light to mean anything that stands out dramatically, especially clever remarks that dazzle an audience.
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