What is another word for internal clock?
Pronunciation: [ɪntˈɜːnə͡l klˈɒk] (IPA) 
The term "internal clock" refers to the biological mechanisms responsible for regulating an organism's responses to daily and seasonal changes. Some common synonyms for this concept include circadian rhythm, biological clock, and internal pacemaker. Additional terms that can be used to describe these functions of the body include chronobiology, endogenous rhythms, and diurnal variation. The internal clock is responsible for the sleep-wake cycle, as well as processes such as hormone regulation and temperature control. It is an essential part of the body's ability to adapt to changes in the environment and maintain its internal equilibrium. Overall, the internal clock is a complex and important part of the human body that affects numerous biological processes.
