body clock


: 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 meant to follow peoples’ body clocks, but may interrupt your sleep. Ramsey Qubein, Condé Nast Traveler, 31 July 2023 Early birds ranked themselves as more than five years older than evening types, also known as night owls, and four years older than intermediate types, people with a body clock that doesn’t fit either extreme. Sandee Lamotte, CNN, 26 Mar. 2024 Sleep experts, for example, are concerned about the impact of forcing a human to wake up at an allotted time—and subsequently back to sleep—as opposed to allowing a person’s body clock to synchronize with natural daylight hours. Eleanor Pringle, Fortune, 23 Mar. 2024 And they were given the early practice, at 10 a.m. local time (7 a.m. on their body clocks), while the other three teams here — all from the Central or Eastern time zones — went later. Mark Zeigler, San Diego Union-Tribune, 28 Mar. 2024 Adjust the timing of other daily routines such as meals, exercise and medications, all of which are unconscious time cues for your internal body clock. Wire Service, The Mercury News, 4 Mar. 2024 Sun exposure in the morning can help set your circadian rhythm, which helps regulate your internal body clock. Kelsey Mulvey, Sunset Magazine, 6 Feb. 2024 When a person’s sleep cycles are out of sync with their environment and internal body clock, that can lead to health issues.4 Castriotti explained that having jet lag after a long flight is a good way to illustrate it. Julia Landwehr, Health, 29 Dec. 2023 Experts recommend leaning in to your body’s natural body clock and using red light therapy or lights designed to lessen seasonal affective disorder (SAD) during the winter months. Lauryn Higgins, Health, 20 Oct. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'body clock.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1916, in the meaning defined above

Time Traveler
The first known use of body clock was in 1916

Dictionary Entries Near body clock

Cite this Entry

“Body clock.” Dictionary, Merriam-Webster, Accessed 18 Jun. 2024.

Medical Definition

body clock

: the internal mechanisms that schedule bodily functions and activities
not usually used technically
Last Updated: - Updated example sentences
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