jupon

1. (historical) A close-fitting sleeveless jacket, descending below the hips, worn over armour.Examples: "Some wore coat armour, imitating scale, And next their skins were stubborn shirts of mail; Some wore a breastplate and a light juppon, Their horses clothed with rich caparison;"; "He climbed three marble steps, crossed the terrace and entered a dim foyer, where a chamberlain silently helped him from his helmet, his jupon and his chain cuirass."historical