Last Updated
：2025/12/07
原生代
Hiragana
げんせいだい
Proper noun
Japanese Meaning
原生代
Easy Japanese Meaning
およそ二十五おく年前から五おく四千万年前までの とても古い地球の時代の名まえ
Sense（1）
the Proterozoic eon
（ canonical ）
（ romanization ）
（ hiragana ）
Quizzes for review
See correct answer
原生代
See correct answer
The Proterozoic eon is the longest era in the history of the Earth.
The Proterozoic eon is the longest era in the history of the Earth.
See correct answer
原生代は地球の歴史の中で最も長い時代です。
Japanese - English
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