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
Stop eating a few hours before bed Another crucial player in your body’s internal clock?
—
Ashley Abramson, Allure, 13 Feb. 2025
Your Circadian Rhythm May Influence Your Symptoms Your circadian rhythm is your body’s 24-hour internal clock.
—Korin Miller, Verywell Health, 10 Jan. 2025
Common triggers The onset of sunset anxiety could be related to the circadian rhythm, which is the body’s internal clock that regulates many functions, according to experts.
—Erica Lamberg, Fox News, 26 Dec. 2024
Crossing longitudes quickly leaves our internal clock—otherwise known as our circadian rhythm—and the actual clock at our destination misaligned.
—Tim Neville, Outside Online, 5 Dec. 2024
See All Example Sentences for internal clock
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Ashley Abramson, Allure, 13 Feb. 2025
Your Circadian Rhythm May Influence Your Symptoms Your circadian rhythm is your body’s 24-hour internal clock.
—Korin Miller, Verywell Health, 10 Jan. 2025
Common triggers The onset of sunset anxiety could be related to the circadian rhythm, which is the body’s internal clock that regulates many functions, according to experts.
—Erica Lamberg, Fox News, 26 Dec. 2024
Crossing longitudes quickly leaves our internal clock—otherwise known as our circadian rhythm—and the actual clock at our destination misaligned.
—Tim Neville, Outside Online, 5 Dec. 2024
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 2 Mar. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share