single panes in a window divided by muntins, though this reduces the effectiveness of the insulation. Other insulating glass arrangements include insertion of a decorative grid of simulated metal, wooden, or plastic muntins sandwiched between two large panels of glass, sometimes adding another grid of simulated wood muntins facing the interior to produce a more convincing divided light appearance. In furniture In furniture, a muntin is the central vertical member of the framework of a piece of furniture, the outside members being called stiles. References Windows Architectural elements