noun
steel or iron dome; iron umbrella
Refers to a protective dome-shaped structure made of steel or iron, often in architectural or military contexts. The term is relatively rare and may be encountered in historical or technical descriptions.
その建物の屋上には鉄傘が設置されていた。
An iron dome was installed on the roof of that building.
鉄傘は砲弾から守るために設計された。
The iron dome was designed to protect against shells.