Last Updated
：2025/12/06
白亜紀
Hiragana
はくあき
Proper noun
Japanese Meaning
中生代の最後の時代区分で、約1億4500万年前から約6600万年前までの期間を指す地質時代・地質系統の名称。恐竜が繁栄し、被子植物が多様化したが、この時代の末期に大量絶滅が起こったとされる。
Easy Japanese Meaning
およそ一おく四せん五ひゃく万年まえから六千六百万年まえまでの地質の時代
Sense（1）
the Cretaceous
（ canonical ）
（ romanization ）
（ hiragana ）
Quizzes for review
See correct answer
The dinosaurs of the Cretaceous were very large.
See correct answer
白亜紀の恐竜は非常に大きかった。
Japanese - English
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