noun
Refers to a rounded roof or ceiling structure, often in architecture. Not an everyday word; more likely in technical or descriptive contexts.
この建物の円頂は遠くからでも目立つ。
The dome of this building stands out even from a distance.
教会の円頂には美しいフレスコ画が描かれている。
A beautiful fresco is painted on the cupola of the church.