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Permian

[pur-mee-uh n] /ˈpɜr mi ən/
adjective
1.
Geology. noting or pertaining to a period of the Paleozoic Era occurring from about 280 to 230 million years ago and characterized by a profusion of amphibian species.
noun
2.
Geology. the Permian Period or System.
3.
Origin
1835-1845
1835-45; Perm + -ian
Related forms
post-Permian, adjective
pre-Permian, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Permian

Permian

/ˈpɜːmɪən/
adjective
1.
of, denoting, or formed in the last period of the Palaeozoic era, between the Carboniferous and Triassic periods, which lasted for 60 000 000 years
noun
2.
the Permian, the Permian period or rock system
Word Origin
C19: after Perm, Russia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Permian

1841, "pertaining to the uppermost strata of the Paleozoic era," named by British geologist Sir Roderick Impey Murchison (1792-1871) for the region of Perm in northwestern Russia, where rocks from this epoch are found.

Online Etymology Dictionary, © 2010 Douglas Harper
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Permian in Science
Permian
  (pûr'mē-ən)   
The seventh and last period of the Paleozoic Era, from about 286 to 245 million years ago. During the Permian Period the supercontinent Pangaea, comprising almost all of today's landmasses, formed. Gymnosperms evolved, the first modern conifers appeared, and reptiles diversified. The Permian Period ended with the largest known mass extinction in the history of life. It wiped out nearly 90 percent of known marine life forms. See Chart at geologic time.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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