Wiktionary
n. 1 (context meteorology astronomy English) A very rare phenomenon observed in morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash of blue light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere. 2 (context nuclear physics English) A phenomenon sometimes observed when a criticality incident occurs in nuclear materials, inducing a discharge of radiation into the environment.
Usage examples of "blue flash".
Here and there, Phaid could see the brilliant blue flash of fuse tubes and the more purple flare of blasters.
As he took his place, a blue flash reflected upwards through the opening, followed by a rolling boom and an anguished scream.
There was a blue flash from the other side of the pile of quarrystone.
The ferrule met the bubble with a blue flash that jolted him as though he'd slammed his staff into a boulder.
His screens damped automatically to keep from being overloaded, but the blue flash was reflected onto Ortnahme through the open hatch as Hermans Whore bucked with the recoil.
His screens damped automatically to keep from being overloaded, but the blue flash was reflected onto Ortnahme through the open hatch as Herman's Whore bucked with the recoil.
The blue flash sent blades and fragments of the shorted windings in all directions, like shrapnel from a bomb burst.
Powergun ammunition detonated in an intense blue flash devoured the target.