HomeDictionary元古宙元古宙Wordpre-Cambrian (geological eon 2500-645m)Copy wordyuán gǔ zhòuyuan2gu3zhou4Hear itMeaningpre-Cambrian (geological eon 2500-645m) CC-CEDICTCharacters in 元古宙元yuán古gǔ宙zhòu