clerestory

詳細解釋：

clerestory 也作 clear.sto.ry

n.（名詞）
【複數】 clere.sto.ries
The upper part of the nave, transepts, and choir of a church, containing windows.
縱向天窗，頂樓：教堂正廳、袖廊及唱詩班席位的上部，包括窗戶
An upper portion of a wall containing windows for supplying natural light to a building.
高側窗：牆的上半部分,裝有給建築物提供自然光線的窗戶

來源：
Middle English clerestorie
中古英文 clerestorie
perhaps cler [giving light, clear] * see clear
可能為 cler [提供光線，清晰] *參見 clear
storie [tier] * see story 2
storie [一層] *參見 story2