元古代 Save Sign in to save words yuángǔdài ㄩㄢˊ ㄍㄨˇ ㄉㄞˋ Proterozoic (geological era 2500-540m years ago) Character by character 元(yuán)surname Yuan 古(gǔ)surname Gu 代(dài)be a substitute for A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0