bartizan
Battlemented unroofed turret or parapet, circular or square, projecting on corbels or machicolations from an angle at the top of a tower or wall. See tourelle.
Bartisan (a) Bartisan with plain crenellation. (b) Coxton Tower, Lhanbryde, near Elgin, Morayshire, Scotland (C16), showing a bartisan and tourelle (the two are often confused, but the forms are quite different) (after MacG&R, 1887).
