biological clock

C1
UK/ˌbaɪəˌlɒdʒɪkəl ˈklɒk/US/ˌbaɪəˌlɑːdʒɪkəl ˈklɑːk/

Neutral to formal

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Definition

Meaning

The natural internal mechanism that regulates an organism's physiological and behavioral cycles, particularly circadian rhythms.

In common usage, particularly regarding women, it refers to the perceived pressure to have children before fertility declines with age.

Linguistics

Semantic Notes

The term has two primary meanings: 1) The scientific sense of internal timing mechanisms, present in all organisms. 2) The social/cultural sense of reproductive timing, often used in relation to women's fertility.

Dialectal Variation

British vs American Usage

Differences

Both senses are used identically in both varieties.

Connotations

Slightly more common in American media when referring to reproductive timing in social contexts.

Frequency

Comparably frequent in both varieties.

Vocabulary

Collocations

strong
internal biological clockcircadian biological clockticking biological clockwoman's biological clock
medium
reset the biological clockfollow one's biological clockbiological clock is running out
weak
listen to your biological clockbiological clock alarmbiological clock schedule

Grammar

Valency Patterns

[subject]'s biological clockthe biological clock of [organism]feel/experience pressure from one's biological clock

Vocabulary

Synonyms

Strong

reproductive timingfertility timeline

Neutral

circadian rhythminternal clockbody clock

Weak

natural timerphysiological clock

Vocabulary

Antonyms

external schedulesocial clockartificial timing

Phrases

Idioms & Phrases

  • The clock is ticking
  • Against the clock
  • Race against time

Usage

Context Usage

Business

Rarely used except in biotech or healthcare industries.

Academic

Common in biology, medicine, and psychology papers.

Everyday

Frequent in discussions about sleep, aging, and family planning.

Technical

Precise term in chronobiology for endogenous timing systems.

Examples

By Part of Speech

verb

British English

  • The experiment aimed to biological-clock synchronise the mice.
  • Researchers are trying to biological-clock reset shift workers.

American English

  • The therapy helps to biological-clock regulate patients with insomnia.
  • We need to biological-clock adjust after jet lag.

adverb

British English

  • The plants grew biological-clock rhythmically.
  • Her fatigue felt biological-clock related.

American English

  • The animals migrated biological-clock precisely.
  • His mood swings seemed biological-clock driven.

adjective

British English

  • She felt biological-clock pressure as she approached forty.
  • The study examined biological-clock disruption in nurses.

American English

  • He experienced biological-clock anxiety about starting a family.
  • Biological-clock research has advanced significantly.

Examples

By CEFR Level

A2
  • My biological clock wakes me at 7 AM every day.
  • Plants have a biological clock that tells them when to flower.
B1
  • Traveling across time zones can disrupt your biological clock.
  • Many women feel their biological clock ticking in their thirties.
B2
  • Researchers are studying how light exposure resets our biological clock.
  • The pressure from her biological clock influenced her decision to start a family sooner.
C1
  • Chronobiology examines the molecular mechanisms underlying the biological clock.
  • The societal discourse often reduces women's reproductive choices to the simplistic notion of a ticking biological clock.

Learning

Memory Aids

Mnemonic

Imagine a tiny alarm clock inside your cells that tells your body when to sleep, wake, and (metaphorically) when to consider having children.

Conceptual Metaphor

TIME IS A RESOURCE (running out); THE BODY IS A MACHINE (with internal mechanisms).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Avoid literal translation as 'биологические часы' only for the scientific sense; for reproductive sense, use 'возрастные часы' or explain contextually.

Common Mistakes

  • Using 'biological clock' to mean general aging process rather than specific timing mechanisms.
  • Assuming it applies only to humans (it exists in all living organisms).

Practice

Quiz

Fill in the gap
After flying to Tokyo, it took me three days to reset my .
Multiple Choice

Which context typically uses 'biological clock' in its extended, social sense?

FAQ

Frequently Asked Questions

Scientifically, yes—all humans have circadian biological clocks. In the extended social sense, while male fertility declines more gradually, recent research shows increased reproductive risks with paternal age, though the term is less commonly applied to men.

You can reset or adjust your circadian biological clock through light exposure, meal timing, and consistent sleep schedules, but you cannot eliminate it entirely as it's genetically programmed.

Yes, it is a legitimate term in chronobiology referring to endogenous timekeeping systems. The colloquial use regarding reproduction is a metaphorical extension.

Because female fertility has a more pronounced age-related decline (especially after 35), leading to common social and media narratives that emphasize reproductive timing for women.

biological clock - meaning, definition & pronunciation - English Dictionary | Lingvocore