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- Dictionaryball lightning
noun
- 1. a rare and little known kind of lightning having the form of a moving globe of light several centimetres across which persists for periods of up to a minute.
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noun
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Ball lightning is a rare and unexplained phenomenon described as luminescent, spherical objects that vary from pea-sized to several meters in diameter. Though usually associated with thunderstorms, the observed phenomenon is reported to last considerably longer than the split-second flash of a lightning bolt, and is a phenomenon distinct from St. Elmo's fire. Wikipedia