rocket lightning

rocket lightning

[′räk·ət ‚līt·niŋ]
(geophysics)
A rare form of lightning whose luminous channel seems to advance through the air with only the speed of a skyrocket.
References in periodicals archive ?
Mr Williams, former head of geography at Abergele Grammar School and Howell's School in Denbigh, took photographs of the amazing sight - a rare spectacle often known as "blue jets" or "rocket lightning".