The permian
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from or referring to the period of time between about 290 and 250 million years ago, in which large reptiles and amphibians appeared, and that ended with most species on earth becoming extinct (= dying out completely) :
The permian meaning & definition 1 of The permian.
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the period of time between about 290 and 250 million years ago, in which large reptiles and amphibians appeared, and that ended with most species on earth becoming extinct (= dying out completely) :
The permian meaning & definition 2 of The permian.
