blue jet
noun
a faint discharge of blue light from the top of a thunderstorm cloud that propagates upward: extends approximately from the bottom to the top of the stratosphere and is not detectable from the ground.
Also called
reverse lightning.
Origin of blue jet
1990–95
Words nearby blue jet
blue in the face,
blue island,
blue jasmine,
blue jay,
blue jeans,
blue jet,
blue john,
blue law,
blue laws,
blue lias,
blue line
Scientific definitions for reverse lightning (1 of 2)
reverse lightning
A flash of light in the sky caused by an electrical discharge from the Earth's surface to a cloud. Reverse lightning is so called because lightning typically occurs between clouds or travels from a cloud to the Earth's surface. Also called return stroke See note at lightning.
Scientific definitions for reverse lightning (2 of 2)
blue jet
A conical discharge of blue light that starts from the top of active thunderstorm clouds and proceeds upward. Blue jets can last up to several hundred milliseconds and are believed to connect the top of a thundercloud with the ionosphere.