Meaning: Recurring naturally on a twenty-four-hour cycle  (biological processes), even in the absence of light fluctuations.

Synonyms: biological rhythm, body clock, happening at particular intervals of time, alternate, annually, biennial.

In Hindi:  जैविक प्रक्रिया.

Use: Many physiological processes such as body temperature have a circadian rhythm, rising and falling each 24 hours.

When you remain awake all night, your circadian rhythm does not cease.

To understand how exercise affects sleep, you must understand the circadian rhythm of the human body.


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