Any good anagrams for biovac?

n.s..

in war. A guard at night performed by the whole army; which, either at a siege, or lying before an enemy, every evening draws out from its tents or huts, and continues all night in arms before its lines or camp, to prevent any surprise. To raise the biovac, is to return the army to their tents at break of day. Antoine Furetière John Harris

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