P / praetentūra
noun

praetentūra

gen. praetentūrae · gender feminine · decl. 1st
a military guard on the boundaries of a province; a frontier-guard
a military guard on the boundaries of a province, a frontier-guard (post-class.): Mesopotamiae tractus praetenturis et stationibus servabantur agrariis, Amm. 14, 3, 2.—
A barricade
A barricade, Amm. 14, 2, 4.