noun
iron armor; iron helmet
Historical term for iron body armor or an iron helmet, often in the context of traditional Japanese warfare.
戦国時代の武将は鉄甲を身に着けていた。
Warlords in the Sengoku period wore iron armor.
その鉄甲は矢を防ぐのに有効だった。
The iron helmet was effective at deflecting arrows.