noun
Refers to a rounded roof structure, such as a dome or cupola, in architecture.
教会の丸屋根が遠くから見えた。
The church's dome was visible from afar.
この建物は丸屋根が特徴的だ。
This building is characterized by its vaulted roof.
Compound of 丸 (まる, 'round') + 屋根 (やね, 'roof'). The alternate kanji 円 also means 'round' or 'circle'.