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Permian

Per·mi·an

Permian

 
pronunciation:
puhr mi n
parts of speech:
adjective, noun
part of speech: adjective
definition: of, relating to, or designating the last geological period of the Paleozoic Era, from approximately 280 million to 220 million years ago, when reptiles became prominent, major mountain ranges such as the Appalachians formed, and great glaciers appeared in the Southern Hemisphere.
 
part of speech: noun
definition: the Permian Period, or the rock formations that date from that time.