かいおうせいがいてんたい 海王星外天体 LinksSentence search for 海王星外天体Sentence search for かいおうせいがいてんたいKanji details for 海, 王, 星, 外, 天 and 体Edit in JMdict Noun1. trans-Neptunian object; transneptunian object; TNOAstronomy Discussions Log in to talk about this word.