uindexultradian./uhl-trey-dee-uhn/US // ʌlˈtreɪ di ən //超昼夜,超日照,超时空,超昼夜温差Definitionsadj.adjective · 形容词1.›of or relating to a biorhythm having a period of less than 24 hours.Level 5More words in u →