ペルム紀きペルムきMeanings1nounPermian periodGeological period from about 299 to 252 million years ago, the last period of the Paleozoic era.ペルム紀きの終おわりに、大だい規き模ぼな生せい物ぶつの絶ぜつ滅めつが起おきた。At the end of the Permian period, a mass extinction occurred.
