- Beam above a window or door - Beam over a door - Beam over a door or window - Door support - Doorway beam - What is a horizontal support across the top of a door or window? - Window stone
- defensive porthole - An embrace. - A splay of a door or window. - An aperture with slant sides in a wall or parapet,
through which cannon are pointed and discharged; a crenelle. See
Illust. of Casemate.