turret

汉语翻译：
n. 塔楼, 角楼, 攻城用仰冲车
【机】 转塔, 多角刀架英语解释：
名词 turret:

a small tower extending above a building

a self-contained weapons platform housing guns and capable of rotation同义词：gun enclosure, gun turret

An armored protective cylinder around a revolving gun turret on a warship.军舰上的露天炮塔军舰上旋转炮塔四周的保护性装甲圆柱体

A fortress often has turrets.堡垒往往带有塔楼。