Turrets

noun
1.
a small tower, usually one forming part of a larger structure.
2.
a small tower at an angle of a building, as of a castle or fortress, frequently beginning some distance above the ground.
3.
Also called turrethead
[tur-it-hed, tuhr-] /ˈtɜr ɪtˌhɛd, ˈtʌr-/ (Show IPA). a pivoted attachment on a lathe or the like for holding a number of tools, each of which can be presented to the work in rapid succession by a simple rotating movement.
4.
Military. a domelike, sometimes heavily armored structure, usually revolving horizontally, within which guns are mounted, as on a fortification, ship, or aircraft.
5.
Fortification. a tall structure, usually moved on wheels, formerly employed in breaching or scaling a fortified place, a wall, or the like.
noun
1.
a small tower that projects from the wall of a building, esp a medieval castle
2.

a self-contained structure, capable of rotation, in which weapons are mounted, esp in tanks and warships
a similar structure on an aircraft that houses one or more guns and sometimes a gunner

3.
a tall wooden tower on wheels used formerly by besiegers to scale the walls of a fortress
4.
(on a machine tool) a turret-like steel structure with tools projecting radially that can be indexed round to select or to bring each tool to bear on the work