Vocabulary What does 天王星 (てんのうせい, tennousei) mean? 天王星 (てんのうせい, tennousei) means Uranus (planet). Quick factsReadingてんのうせいRomajitennouseiPart of speechnoun 天王星てんのうせいtennouseiUranus (planet)1noun Uranus (planet)Kanji in this word天sky, heaven王king星star