A small member which divides the glass or openings of sash or doors.

Profile or moulding, either vertical or horizontal, used to separate glass in a sash into multiple lites. Generally refers to components used to construct divided lite grids or grilles simulating a divided lite look.

The individual pieces of a decorative grid that help divide a glass opening into smaller sections 

A small vertical or horizontal strip that divides window panes from each other.

Intermediate upright in panelling.    (Wood, Margaret. The English Medieval House, 413)

A small member which divides the glass or openings of sash or doors.

A small member, which divides the glass or openings of sash or doors.

A short bar, horizontal or vertical extending from a bar to a stile, rail or other bar.

Vertical or horizontal bars used to separate glass in a sash into multiple lights. Often called a grille.

Profile or moulding, either vertical or horizontal, used to separate glass in a sash into multiple lites. Generally refers to components used to construct divided lite grids or grilles simulating a di [..]

A strip of wood or metal separating and holding panes of glass in a window sash. Each pane of glass (or each "insulated glazing unit") separated by a muntin is called a light.