装そう甲こう艦かんMeanings1nounarmored warship; ironcladHistorical naval term for a warship protected by armor plating, especially from the 19th century.19世せい紀き後こう半はん、装そう甲こう艦かんは海かい戦せんの主しゅ力りょくとなった。In the late 19th century, armored warships became the mainstay of naval warfare.