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Definitions

biological clock

[bahy-uh-loj-i-kuhl klok] / ˈbaɪ əˌlɒdʒ ɪ kəl ˈklɒk /


Example Sentences

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Women’s expanded education and opportunity spread that window across three decades, which raises the odds of running out the biological clock while still looking for a suitable mate.

From The Wall Street Journal • Jun. 6, 2026

She argues that switching to daylight-saving time ultimately plays havoc with our circadian rhythm — that is, our internal biological clock.

From MarketWatch • Mar. 6, 2026

Both evolutionary theories and psychological research on the "biological clock" would have suggested a later decline, namely between the ages of 40 and 50, when women approach the end of their reproductive phase.

From Science Daily • Dec. 12, 2023

It could also take longer to regulate their circadian biological clock, compared to those without the condition.

From BBC • Oct. 23, 2023

Her biological clock was ticking rapidly toward nest- scraping time.

From "Frightful's Mountain" by Jean Craighead George




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