ecclesiastical vestment, c.1300, cheisible, from Old French chesible (12c., Modern French chasuble), from Medieval Latin casubla, from Late Latin *casubula, unexplained alteration of Latin casula "a little hut," diminutive of casa "cottage, house" (see casino), used by c.400 in transferred sense of "outer garment." From the notion that hooded garments resembled or suggested little houses. The English form conformed to French from c.1600.