2. Jamb
The main vertical members forming the sides of a window or door frame.

3. Frame
The combination of head, jambs and sill to form a precise opening in which a window sash or door panel fits.

4. Glazing
The process of applying or installing glass into a window sash or door panel. Also refers to the type of glass used in the process.

5. Pane
A framed sheet of glass within a window or door frame.

6. Sash
A single assembly of stiles and rails made into a frame for holding glass.

7. Sill
The main horizontal member forming the bottom of the frame of a window or door.

8. Muntin Bar
Any small bar that divides window or door glass. Also called a grille or windowpane divider.