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bluejet (plural bluejets)
- (astronomy, meteorology) an upper atmospheric optical phenomenon associated with thunderstorms, rapidly expanding disk-shaped regions of luminosity, lasting less than a thousandth of a second, which occur high above energetic cloud-to-ground lightning of positive or negative polarity
- 1999, Patricia Barnes-Svarney, Thomas E. Svarney, Skies of fury: weather weirdness around the world, Simon and Schuster:
- Mysterious bluejets can be seen with the naked eye from the ground, but they are rare and difficult to spot.