Read Edit View history Discussion 二叠纪 èrdiéjì Permian Origin Definitions Defs Strokes Stroke Words Sentences Sents 二叠纪 二疊紀 èrdiéjì Permian The Permian period, the last geological period of the Paleozoic era; it occurred approximately 299 to 251 million years ago. Frequency Written text 0.183 per million Cross-References Referenced by 二叠系 èrdiéxìHas variant 二迭纪 èrdiéjì Sources Frequency data BCC Corpus (BLCU)
二叠纪 二疊紀 èrdiéjì Permian The Permian period, the last geological period of the Paleozoic era; it occurred approximately 299 to 251 million years ago. Frequency Written text 0.183 per million Cross-References Referenced by 二叠系 èrdiéxìHas variant 二迭纪 èrdiéjì Sources Frequency data BCC Corpus (BLCU)