circumburst en · ADJ
Etymology
From circum- + burst.
Meanings
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(not-comparable) Surrounding a burst
In order to probe the nature of the long-duration GRB progenitor, it is critical to understand the nature of the circumburst medium in which the progenitor is immersed.
2014, Robert Allan Mesler III, Searching for the Long-Duration Gamma-Ray Burst Progenitor: