介かい馬ばMeanings1nounarmored horsearchaicArchaic term for a horse equipped with armor, used in historical or military contexts.古こ戦せん場じょうの絵え巻まきには、介かい馬ばに乗のった武ぶ将しょうが描えがかれている。In the picture scroll of the ancient battlefield, a warlord riding an armored horse is depicted.