まるてんじょう 丸天井 LinksSentence search for 丸天井Sentence search for まるてんじょうSentence search for 円天井Kanji details for 丸, 天 and 井Edit in JMdict Noun1. arched ceiling; vaulted ceiling; domed ceiling; circular ceilingOther forms円天井 【まるてんじょう】 Discussions Log in to talk about this word.