元古宙 yuángǔzhòu Proterozoic Definitions Defs Origin Strokes Stroke Words Sentences Sents 元古宙 yuángǔzhòu Proterozoic the Proterozoic Eon, a geological eon from approximately 2500 to 541 million years ago (following the Archean and preceding the Phanerozoic) Frequency Written text 0.038 per million Sources Frequency data BCC Corpus (BLCU)
元古宙 yuángǔzhòu Proterozoic the Proterozoic Eon, a geological eon from approximately 2500 to 541 million years ago (following the Archean and preceding the Phanerozoic) Frequency Written text 0.038 per million Sources Frequency data BCC Corpus (BLCU)
