Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun meteorology, astronomy 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.
  • noun nuclear physics A phenomenon sometimes observed when a criticality incident occurs in nuclear materials, inducing a discharge of radiation into the environment.

Etymologies

Sorry, no etymologies found.

Support

Help support Wordnik (and make this page ad-free) by adopting the word blue flash.

Examples

    Sorry, no example sentences found.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.