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
The circadian rhythm is our body’s internal clock that maintains behavior and physiology according to our environment.
—
Gina Park, CNN, 2 Nov. 2024
Your circadian rhythm is your body's 24-hour natural internal clock in the brain that manages alertness and sleepiness.
—Lana Barhum, Verywell Health, 24 Oct. 2024
Perhaps our oldest ancestors needed to invent an internal clock to survive the stresses of seasonal weather — and then daily cycles were built on top of that.
—Elizabeth Landau, quantamagazine.org, 11 Oct. 2024
That can also improve our circadian rhythm, or our internal clock, which can in turn help our sleep.
—Addy Bink, The Hill, 3 Nov. 2024
See all Example Sentences for internal clock 
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Gina Park, CNN, 2 Nov. 2024
Your circadian rhythm is your body's 24-hour natural internal clock in the brain that manages alertness and sleepiness.
—Lana Barhum, Verywell Health, 24 Oct. 2024
Perhaps our oldest ancestors needed to invent an internal clock to survive the stresses of seasonal weather — and then daily cycles were built on top of that.
—Elizabeth Landau, quantamagazine.org, 11 Oct. 2024
That can also improve our circadian rhythm, or our internal clock, which can in turn help our sleep.
—Addy Bink, The Hill, 3 Nov. 2024
See all Example Sentences for internal clock
Dictionary Entries Near internal clock
Cite this Entry
“Internal clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/internal%20clock. Accessed 21 Nov. 2024.
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