barbette

詳細解釋：

bar.bette

n.（名詞）
A platform or mound of earth within a fort from which guns are fired over the parapet.
炮墩，炮座：堡壘內部的平台或土墩，大炮可從中越過胸牆而發射
An armored protective cylinder around a revolving gun turret on a warship.
軍艦上的露天炮塔：軍艦上旋轉炮塔四周的保護性裝甲圓柱體

來源：
French [diminutive of] barbe [beard] * see barb
法文 [] barbe的小後綴 [須] *參見 barb