A person’s or animal’s biological clock.
More example sentences
- Our body clock, our internal clock, is linked to the 24-hour day.
- Melatonin resets the body clock to synchronize metabolic functions with times of activity and rest.
- Jet lag occurs, I learned, because changes in time zones confuse our internal body clock or our ‘circadian rhythms’; profound biorhythms which date back to Stone Age man.
Definition of body clock in:
- The British & World English dictionary