Last Updated：2025/11/20

(geology) The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago.

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Hadean

Source Word

Hadean

Proper noun

(geology) The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago.

Japanese Meaning

冥王代。約46億年前から約40億年前の地質時代で、原始地球の形成期を示す名前。

Geologists study the Hadean to understand the earliest conditions on Earth.

地質学者たちは地球の初期の状態を理解するために冥王代を研究する。

Sense（1）

(geology) The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago.