pane

Etymology 1

From Middle English pane, pan, from Old French pan, from Latin pannus. Doublet of pagne, pan, and pannus.

noun

1. An individual sheet of glass in a window, door, etc.
   We need doubling glazing as this window pane lets out lots of heat.
2. (computing, graphical user interface) A portion of a user interface that typically makes up part of a larger window and may be docked or snapped into position.
3. A division; a distinct piece or compartment of any surface.
4. A square of a checkered or plaid pattern.
5. One of the openings in a slashed garment, showing the bright colored silk, or the like, within; hence, the piece of colored or other stuff so shown.
6. (architecture) A compartment of a surface, or a flat space; hence, one side or face of a building.
   An octagonal tower is said to have eight panes.
7. A subdivision of an irrigated surface between a feeder and an outlet drain.
8. One of the flat surfaces, or facets, of any object having several sides.
9. One of the eight facets surrounding the table of a brilliant-cut diamond.

verb

1. (transitive) To fit with panes.
   For example, by paning the glass horizontally (putting a single horizontal slat through the middle of the window), it almost looks as if you installed two windows. 1985, Edward M. Baras, The Symphony Book, page 91

Etymology 2

noun

1. Alternative spelling of peen