interfenestration
[ in-ter-fen-uh-strey-shuh n ]
/ ˌɪn tərˌfɛn əˈstreɪ ʃən /
noun
a space between two windows.
the art or process of arranging the openings in a wall.
Origin of interfenestration
First recorded in 1815–25;
inter- +
fenestration