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window 
Opening in a wall fitted with glass to let in light and air.
structure
sill of frame
Lower level part of the window sash frame.
weatherboard
Sloped strip of wood allowing water to flow away from the window.
shutter
Exterior panel made of solid wood protecting the glass portion of the window.
hinge
Small metal part pivoting on a gudgeon to let the casement swing.
hook
Curved part holding the jalousie or shutter in place.
sash frame
Fixed frame encasing the movable part of the window.
hanging stile
Vertical part of the frame to which the hinges are attached; it allows the window to open.
casement
Movable window panel, with or without glass, that swings on hinges.
jalousie
Exterior panel composed of horizontal strips protecting the window from the sun or rain while allowing air to pass through.
casing
Protruding border surrounding the sash frame of the window.
top rail of sash
Level piece of wood at the top of the movable part of the window.
pane
Small glass plate in a window or door.
muntin
Small jamb or crosspiece holding a window pane in place.
head of frame
Upper level part of the window frame.
stile tongue of sash
Vertical part of the frame with a rounded side that fits into the stile groove of the sash.
stile groove of sash
Vertical part of the frame with a concave groove; the stile tongue of the sash fits into it.
