body clock
noun
: the internal mechanisms that schedule periodic bodily functions and activities
—usually not used technically
Examples of body clock in a Sentence
It takes a while for my body clock to get adjusted when I fly from New York to London.
Recent Examples on the Web
Adults with an evening chronotype and potentially even those who wake up early could be at high risk due to their internal body clocks not matching up with work schedules and other external factors.
—
Lily Hautau, CNN Money, 29 Jan. 2026
Reduced sunlight can impact your body’s circadian rhythm — basically, your internal body clock.
—Jacqueline Kilikita, Refinery29, 29 Jan. 2026
In other words, how the light influenced their internal body clocks.
—New Atlas, 17 Jan. 2026
With a weaker circadian rhythm, light and schedule changes are more likely to disrupt the body clock, leading to shifts in sleep and activity patterns.
—Khloe Quill, FOXNews.com, 6 Jan. 2026
See All Example Sentences for body clock
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Lily Hautau, CNN Money, 29 Jan. 2026
Reduced sunlight can impact your body’s circadian rhythm — basically, your internal body clock.
—Jacqueline Kilikita, Refinery29, 29 Jan. 2026
In other words, how the light influenced their internal body clocks.
—New Atlas, 17 Jan. 2026
With a weaker circadian rhythm, light and schedule changes are more likely to disrupt the body clock, leading to shifts in sleep and activity patterns.
—Khloe Quill, FOXNews.com, 6 Jan. 2026
See All Example Sentences for body clock
Cite this Entry
“Body clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/body%20clock. Accessed 3 Feb. 2026.
Copy CitationMedical Definition
body clock
noun
: the internal mechanisms that schedule bodily functions and activities
—not usually used technically
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