blue jet

== English == === Alternative forms === blue-jet, bluejet === Noun === blue jet (plural blue jets) (astronomy, meteorology) An upper atmospheric optical phenomenon associated with thunderstorms, a rapidly expanding disk-shaped region of luminosity, lasting less than a thousandth of a second, which occurs high above energetic cloud-to-ground lightning of positive or negative polarity. ==== Translations ==== ==== See also ==== blue starter elve gigantic jet gnome pixie red sprite sprite halo sprite transient luminous event troll upward lightning