The term 'Jalousie Parts' refers to the components of a jalousie window, which is a type of window that consists of parallel SLATS of glass or acrylic that are hinged and can be opened and closed. The five-letter solution to this crossword is 'SLATS, ' which are the thin, narrow strips of material that make up the window. SLATS are typically made of metal, wood, or plastic, and they are connected together in a frame to form the window.