COUNTERGUARD
n.[counter and guard. ] In fortification, a small rampart or work raised before the point of a bastion, consisting of two long faces parallel to the faces of the bastion, making a salient angle, to preserve the bastion. It is sometimes of a different shape, or differently situated.
COUNTERGUARD Coun "ter *guard ` (koun "tr-grd `), n. (Fort. )