G5
abbreviation for
Group of Five
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for g5
Fort San Josef is mined, but G5 destroyed the firing station and has cut the wires.
The Dreadnought of the Air|Percy F. Westerman