请输入您要查询的英文单词:

 

单词 Permian
释义

Definition of Permian in English:

Permian

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

    See also Permo–Triassic
    Example sentencesExamples
    • It happened 252 million years ago, at the boundary of the Permian and Triassic geological ages.
    • 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.
    • 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. 1.1as noun the Permian The Permian period or the system of rocks deposited during it.

The Permian lasted from about 290 to 245 million years ago. The climate was hot and dry in many parts of the world during this period, which saw the extinction of many marine animals, including trilobites, and the proliferation of reptiles

Origin

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

Rhymes

vermian
 
 

Definition of Permian in US English:

Permian

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

    The Permian lasted from about 290 million to 245 million years ago. The climate was hot and dry in many parts of the world during this period, which saw the extinction of many marine animals, including trilobites, and the proliferation of reptiles

    See also Permo–Triassic
    Example sentencesExamples
    • The ancestral archosaurs probably originated some 250 million years or so ago, in the late Permian period.
    • Throughout the Permian period the numbers of invertebrate species tends to decrease.
    • Similar features have been seen in Permian and Triassic conifer trunks from Antarctica and North America.
    • 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.
    1. 1.1as noun the Permian The Permian period or the system of rocks deposited during it.

Origin

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

 
 
随便看

 

英语词典包含464360条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/1/9 17:31:03