Last Updated
：2025/12/06
二畳紀
Hiragana
にじょうき
Proper noun
Japanese Meaning
地質時代区分の一つで、古生代最後の紀。石炭紀の次、三畳紀の前にあたり、約2億9900万年前から約2億520万年前までを指す。「二畳紀」とも呼ばれる。 / 上記の「ペルム紀」の別名・異称として用いられる固有名詞。
Easy Japanese Meaning
地球のれきしで、とてもむかしの時代の名まえで、恐竜が生まれる少しまえの時期
Sense（1）
Synonym of ペルム紀
（ canonical ）
（ romanization ）
（ romanization ）
（ hiragana historical ）
（ hiragana ）
Quizzes for review
See correct answer
The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 251 million years ago.
The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 251 million years ago.
See correct answer
二畳紀は地質時代の一つで、約2億5200万年前から約2億5100万年前までの期間を指します。
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