noun
plate armor
Historical term for armor made of metal plates, as opposed to chainmail or lamellar armor.
中世ヨーロッパの騎士は板金鎧を身に着けていた。
Medieval European knights wore plate armor.
Chainmail armor, contrasting with the solid plates of 板金鎧.
Compound of 板金 (sheet metal) and 鎧 (armor). The exact historical derivation is uncertain, but the term straightforwardly describes armor made from metal plates.