parting strip

noun

1. a strip, as of wood, used to keep two parts separated, as one in each side of the frame of a window to keep the sashes apart when lowered or raised.

parting strip

noun

1. a thin strip of wood, metal, etc, used to separate two adjoining materials

Example Sentences

Then, on at least one side of the window, remove the parting strip that separates the upper and lower sashes.

From Washington Post

The parting strip is a thin piece of wood that fits into a groove, so it isn’t easy to pry out.

From Washington Post