Definition of biological clock in English:
An innate mechanism that controls the physiological activities of an organism that change on a daily, seasonal, yearly, or other regular cycle.
- Yes, that's controlled by an internal biological clock.
- At dusk, however, the insect is activated by an internal biological clock, which regulates most of its behaviors.
- This helps set the internal biological clock that regulates your sleep and waking patterns.
Definition of biological clock in:
- British & World English dictionary
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