φρουρικός

ή, όν, ἡ
A. of, for a watch, guard, or garrison, τὸ φ. D.C. 56.42.
II. φρουρική,ἡ, guard duty, SIG 633.51 (Milet., ii B. C.).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project