noun
horse armor
Archaic term for protective covering worn by horses in battle.
戦国時代の馬鎧は、馬の胴体を守るために使われた。
Horse armor from the Warring States period was used to protect the horse's body.
Compound of 馬 (uma, 'horse') and 鎧 (yoroi, 'armor'). The exact historical derivation is uncertain.