noun. A small, overhanging turret on a wall or tower.

noun. In architecture, a small overhanging turret, pierced with loopholes or embrasures, or with both, and projecting generally from an angle at the top of a tower, or from the parapet of a building or medieval fortification-wall.

noun. A small, overhanging structure for lookout or defense, usually projecting at an angle of a building or near an entrance gateway.

noun. Alternative form of bartisan.

"The heavy yet hasty step of the men-at-arms traversed the battlements, or resounded on the narrow and winding passages and stairs which led to the various bartizans [Footnote: A bartizan is a sort of small overhanging balcony, built for defense or for lookout.] and points of defense."

barbican  baulk  breastwork  flangeway  floatin'  

abatis  advanced work  balistraria  bank  banquette