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
Moving bedtime earlier by 20 to 30 minutes for a few nights can help reset their internal clock and prevent that second wind.
—
ABC News, 10 Mar. 2026
Irregular sleep schedules disrupt the body’s internal clock the same way jet lag does.
—Avery Newmark, AJC.com, 10 Mar. 2026
Going about 12 hours between your last meal of the day and your first meal the next morning may support your metabolism and align with your body’s internal clock.
—Abby Norman, Verywell Health, 9 Mar. 2026
Changing meal times can disrupt the body’s internal clock, which helps regulate blood sugar.
—Merve Ceylan, Health, 8 Mar. 2026
See All Example Sentences for internal clock
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ABC News, 10 Mar. 2026
Irregular sleep schedules disrupt the body’s internal clock the same way jet lag does.
—Avery Newmark, AJC.com, 10 Mar. 2026
Going about 12 hours between your last meal of the day and your first meal the next morning may support your metabolism and align with your body’s internal clock.
—Abby Norman, Verywell Health, 9 Mar. 2026
Changing meal times can disrupt the body’s internal clock, which helps regulate blood sugar.
—Merve Ceylan, Health, 8 Mar. 2026
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 17 Mar. 2026.
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