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red sprite (plural red sprites)
- (astronomy, meteorology) An upper atmospheric optical phenomena associated with thunderstorms, a large but weak luminous flash that appears directly above an active thunderstorm system and is coincident with a powerful positive cloud-to-ground lightning strike.
1999, Patricia Barnes-Svarney, Thomas E. Svarney, Skies of fury: weather weirdness around the world[1], Simon and Schuster, page 99:
Red sprites flash high above thunderstorm clouds.