noun
rose window
Architectural term for a circular stained-glass window with radiating petal-like sections, typical of Gothic cathedrals.
ノートルダム大聖堂のバラ窓はとても有名だ。
The rose window of Notre-Dame Cathedral is very famous.
Compound of バラ (rose) and 窓 (window), a direct calque of English 'rose window'.