Turret
in architecture, a small tower attached to and forming part of another tower, or placed at the angles of a church or public building especially in the style of Tudor architecture. Turrets are of two kinds such as rise immediately from the ground, as staircase turrets, and such as are formed in the upper part of a building by being carried up higher than the rest, as bartizan turrets. In military antiquities, a movable building of a square form, consisting of 10 or even 20 stories, and sometimes 180 feet high, usually moved on wheels, and employed in approaches to a fortified place for carrying soldiers, engines, ladders, etc. In railways, the elevated central portion of a passenger car, whose top forms an upper story of the roof, and whose sides are glazed for light and pierced for ventilation.