二迭纪 èrdiéjì Permian Definitions Defs Origin Strokes Stroke Words Sentences Sents 二迭纪 二迭紀 èrdiéjì Permian (geology) the Permian period, approximately 299 to 251 million years ago Cross-References Variant of 二叠纪 èrdiéjì
二迭纪 二迭紀 èrdiéjì Permian (geology) the Permian period, approximately 299 to 251 million years ago Cross-References Variant of 二叠纪 èrdiéjì
