最終更新日：2024/08/07

(geology) The most ancient time encompassed by a given geological period. / (linguistics) The most recent time encompassed by a given period of time.

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lower boundary

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元となった辞書の項目

lower boundary

noun

The temperature dropped to the lower boundary.

意味（1）

(geology) The most ancient time encompassed by a given geological period.

意味（2）

(linguistics) The most recent time encompassed by a given period of time.