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.
Geology. the Permian Period or System.
- post-Per·mi·an, adjective
- pre-Per·mi·an, adjective
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How to use Permian in a sentence
The fastest rate of reptile diversification did not occur at the end-Permian extinction, the team found, but several million years later in the Triassic, when climate change was at its most rapid and global temperatures witheringly hot.Extreme climate shifts long ago may have helped drive reptile evolution | Beth Geiger | August 19, 2022 | Science News
In any case, the new findings show how comprehensive surveys can shed light on methane emissions, which are often poorly understood even in major oil and gas basins like the Permian.A US oil-drilling hotspot is kicking out far more methane than we thought | Casey Crownhart | March 28, 2022 | MIT Technology Review
Many think this overhaul happened in a planetwide volcanic event, perhaps on par with the end-Permian extinction that wiped out most species on our Pale Blue Dot.These scientists spent decades pushing NASA to go back to Venus. Now they’re on a hot streak. | Corinne Iozzio | June 29, 2021 | Popular-Science
Based on the reptiles’ size, which was around that of today’s hippos or rhinos, researchers had pegged the Permian Period predators as sluggish beasts that waited to ambush prey.An ancient hippo-sized reptile may have been surprisingly agile | Carolyn Wilke | March 15, 2021 | Science News
Occidental, the biggest oil and gas operator in the Permian, will take the carbon dioxide from the air and pump it into old wells to extract more oil.United Airlines aims to suck carbon dioxide from the friendly skies | Steven Mufson | January 12, 2021 | Washington Post
I am today in Odessa, Texas, here to speak this afternoon at the University of Texas of the Permian Basin.
The Triassic flora is essentially similar to that of the higher Permian strata, though many of the genera are different.The Principles of Stratigraphical Geology | J. E. Marr
A few words must be said of the fauna of the truly marine Permian beds.The Principles of Stratigraphical Geology | J. E. Marr
The volcanic outbursts which followed became feebler in the Devonian and Carboniferous periods and ceased with the Permian.
Desert conditions, with confined inland seas, marked the Permian and Triassic periods.
Permian, per′mi-an, n. a group of strata forming the uppermost division of the Palezoic series.
British Dictionary definitions for Permian
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
the Permian the Permian period or rock system
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
Scientific definitions for Permian
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.