internal clock
noun
1
: a system in the body that controls when a person needs to sleep, eat, etc.
The long trip upset my internal clock and I had a hard time getting to sleep.
2
: a clock or timing device that is inside a computer
Examples of internal clock in a Sentence
Recent Examples on the Web
Researchers debate whether animals rely on a single internal clock or multiple overlapping ones.
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Aamir Khollam, Interesting Engineering, 17 Nov. 2025
By calming the nervous system, research shows that Swedish massage also plays a role in regulating the body’s internal clock – encouraging deeper, more restorative sleep cycles.
—Daryl Austin, USA Today, 13 Nov. 2025
More recently, scientists at the hospital discovered how light can reset the body’s internal clock and determined the natural length of our daily sleep–wake cycle.
—Alice Gibbs, MSNBC Newsweek, 10 Nov. 2025
That early light exposure helps reset their internal clock.
—Katia Hetter, CNN Money, 3 Nov. 2025
See All Example Sentences for internal clock
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Aamir Khollam, Interesting Engineering, 17 Nov. 2025
By calming the nervous system, research shows that Swedish massage also plays a role in regulating the body’s internal clock – encouraging deeper, more restorative sleep cycles.
—Daryl Austin, USA Today, 13 Nov. 2025
More recently, scientists at the hospital discovered how light can reset the body’s internal clock and determined the natural length of our daily sleep–wake cycle.
—Alice Gibbs, MSNBC Newsweek, 10 Nov. 2025
That early light exposure helps reset their internal clock.
—Katia Hetter, CNN Money, 3 Nov. 2025
See All Example Sentences for internal clock
Cite this Entry
“Internal clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/internal%20clock. Accessed 28 Nov. 2025.
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