A window part is an element of a window that helps to form the structure and provide support. The term 'window part' can refer to a JAMB, which is the vertical side of the window frame, a PANE, which is the glass or plastic sheet that makes up the window, a SILL, which is the bottom of the window frame, a SASH, which is the frame that holds the window PANE in place, a LINTEL, which is the horizontal beam above the window, a LEDGE, which is a shelf-like protrusion from the wall below the window, a mullion, which is a vertical bar that divides the window into sections, and a sashbar, which is a horizontal bar that divides the window into sections.