gamma-ray burst

noun
1.
a short-lived, extremely luminous burst of gamma radiation from an unknown astronomical source, occurring at random positions in the sky several times a day.
Abbreviation: GRB.
British Dictionary definitions for gammaray burst
gamma-ray burst
 
n
astronomy an intense but short-lived burst of gamma rays from an unknown celestial source. First detected in 1970, they have since been found to be widely distributed in the sky

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