太古宙 Save Sign in to save words tàigǔzhòu ㄊㄞˋ ㄍㄨˇ ㄓㄡˋ Archaean (geological eon before 2500m years ago) Character by character 太(tài)too 古(gǔ)surname Gu 宙(zhòu)eternity A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0