Wiktionary
dormer-window
alt. An upright window built from a sloping roof. n. An upright window built from a sloping roof.
Usage examples of "dormer-window".
When one entered from the north end, one had on one's left the four dormer-windows, on one's right, facing the windows, at regular intervals, four square, tolerably vast cages, separated by narrow passages, built of masonry to about the height of the elbow, and the rest, up to the roof, of iron bars.