panel
noun
1.
sheet that forms a distinct (usually flat and rectangular) section or component of something
Derived from:
panel 3.
4.
5.
a soft pad placed under a saddle
6.
a piece of cloth that is generally triangular or tapering; used in making garments or umbrellas or sails
7.
(computer science) a small temporary window in a graphical user interface that appears in order to request information from the user; after the information has been provided the user dismisses the box with ‘okay’ or ‘cancel’
8.
electrical device consisting of a flat insulated surface that contains switches and dials and meters for controlling other electrical devices