Lewis Short
praetentūra (noun F) : praetendo
* 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, Amm. 14, 2, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary