manteau

le manteau (FR N-M) clothing with or without sleeves, worn over other garments to protect from cold or the elements; woman's or man's overcoat; something that hides or disguises. First appears in French in 1300, from mantel (980), from Latin mantellus, mantus. (Banville, Grandmougin, Gravollet, Louÿs, d'Orléans, Samain, Silvestre)