Read Edit View history 元古宙 yuángǔzhòu Proterozoic Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 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) Edit Delete References Add reference No references for this word.
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) Edit Delete