Rear-arch

Rear-arch - Arch on the inner side of a wall.
Redoubt - Small self-contained fieldwork, a refuge for soldiers outside the main defenses.
Reeded - Parallel convex mouldings.

Rear-arch - arch on the inner side of a wall.
Redan - outwork with two faces forming a salient angle.
Redoubt - small self-contained fieldwork, a refuge for soldiers outside the main defenses.
Reduit - detached, independent outwork.

See also: Hood-mould, Aperture, Bond, Battlement, Church