Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym GLB21 is...

GLB21 is

  • Miscellaneous Observations of Bizarre Ball Lightning

GLB21 is also in:

Acronym Definition Searched: SBYC SGLI LPG WWJB 42051 ERPS TACT OPEC OKF TTY LECT TDW 45638 MTN 08604