Definition of Permian in English:



  • 1Relating to or denoting the last period of the Palaeozoic era, between the Carboniferous and Triassic periods.

    • ‘The ancestral archosaurs probably originated some 250 million years or so ago, in the late Permian period.’
    • ‘Uppermost Permian and Triassic terrestrial sediments conformably overlie the terminal volcanic rocks.’
    • ‘It happened 252 million years ago, at the boundary of the Permian and Triassic geological ages.’
    • ‘Similar features have been seen in Permian and Triassic conifer trunks from Antarctica and North America.’
    • ‘Throughout the Permian period the numbers of invertebrate species tends to decrease.’
    1. 1.1The Permian period or the system of rocks deposited during it.


Late 16th century: from the name of the Russian province Perm, from the extensive development of such strata there.