Definitions from Wiktionary (blue flash)

▸ noun:  (meteorology, astronomy) A very rare phenomenon observed in the 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.
▸ noun:  (nuclear physics) A phenomenon sometimes observed when a criticality incident occurs in nuclear materials, inducing a discharge of radiation into the environment.



▸ Words similar to blue flash
▸ Usage examples for blue flash

▸ Idioms related to blue flash
▸ Wikipedia articles (New!)
▸ Words that often appear near blue flash
▸ Rhymes of blue flash

▸ Invented words related to blue flash