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
This is done through the retinohypothalamic tract, a pathway that connects your eyes to the brain’s master body clock, called the suprachiasmatic nucleus.
—
Khloe Quill, FOXNews.com, 9 Nov. 2025
Exercise is another powerful cue for your body clock and an excellent way to improve sleep quality.
—Katia Hetter, CNN Money, 3 Nov. 2025
Inconsistent wake-up times can mess with your body clock.
—Julia Ries Wexler, SELF, 31 Oct. 2025
And because our internal body clocks don't keep a perfect 24-hour cycle, the master clock in our brains needs a daily reset.
—Allison Aubrey, NPR, 29 Sep. 2025
See All Example Sentences for body 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.
Khloe Quill, FOXNews.com, 9 Nov. 2025
Exercise is another powerful cue for your body clock and an excellent way to improve sleep quality.
—Katia Hetter, CNN Money, 3 Nov. 2025
Inconsistent wake-up times can mess with your body clock.
—Julia Ries Wexler, SELF, 31 Oct. 2025
And because our internal body clocks don't keep a perfect 24-hour cycle, the master clock in our brains needs a daily reset.
—Allison Aubrey, NPR, 29 Sep. 2025
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 10 Nov. 2025.
Copy CitationMedical Definition
body clock
noun
: the internal mechanisms that schedule bodily functions and activities
—not usually used technically
Love words? Need even more definitions?
Merriam-Webster unabridged
Share