biological clock

noun

: an inherent timing mechanism in a living system that is inferred to exist in order to explain the timing or periodicity of various behaviors and physiological states and processes

Examples of biological clock in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
The American Academy of Sleep Medicine (AASM) stated that the human biological clock is why daylight saving impacts sleep. Sophie Okolo, Forbes, 31 Oct. 2024 Light pollution also hurts birds by altering their biological clocks. Brian Handwerk, Smithsonian Magazine, 25 Oct. 2024 In its original state, the song is a rumination on Charli’s biological clock, and not wanting to sacrifice her career to have kids. Hannah Jackson, Vogue, 18 Oct. 2024 As Mellors explains it, her protagonist’s biological clock is ticking alongside the impending climate crisis. Carly Tagen-Dye, People.com, 27 Sep. 2024 See all Example Sentences for biological clock 

Word History

First Known Use

1941, in the meaning defined above

Time Traveler
The first known use of biological clock was in 1941

Dictionary Entries Near biological clock

Cite this Entry

“Biological clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biological%20clock. Accessed 14 Nov. 2024.

Kids Definition

biological clock

noun
: a mechanism that exists in living things and controls the timing of behaviors and bodily functions which occur in cycles

Medical Definition

biological clock

noun
: an inherent timing mechanism in a living system (as a cell) that is inferred to exist in order to explain various cyclical behaviors and physiological processes

More from Merriam-Webster on biological clock

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