砲ほう門もん

noun

gunport; embrasure; muzzle

Refers to an opening in a fortification or ship's side through which a cannon is fired, or the muzzle end of a gun. A technical military term.

• 城じょう壁へきの砲ほう門もんから大たい砲ほうが顔かおをのぞかせていた。

  A cannon was peeking out from the gunport in the castle wall.

• 戦せん艦かんの舷げん側そくにはいくつもの砲ほう門もんが並ならんでいた。

  Several gunports lined the side of the battleship.