Dormer
Pronunciation : Dor"mer, or Dor"mer win"dow (
Part of Speech : n.
Etymology : [Literally, the window of a sleeping apartment. F. dormir to sleep. See Dormant, a. & n.] (Arch.)
Definition : Defn: A window pierced in a roof, and so set as to be vertical while the roof slopes away from it. Also, the gablet, or houselike structure, in which it is contained.
Source : Webster's Unabridged Dictionary, 1913