太古代 Tài gǔ dài 🔊 Archaeozoic (geological era before 2500m… + Review this word Meanings Tài gǔ dài name Archaeozoic (geological era before 2500m years ago) Its characters 太tàitoo; so (very)HSK 1古gǔancientHSK 5代dàito be a substitute forHSK 5