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

Anyway, despite slapping on those herbal Sleep Patches, my body clock remained wholly uncooperative. — Liam Hess, Vogue, 7 Nov. 2026

That alignment is the best thing that could happen to your body clock—and your sleep—all year. — Randy J. Nelson, Scientific American, 30 Oct. 2026

The American Heart Association said body clock disruptions carry an increased risk of obesity, among other medical issues. — Hannah Poukish, Sacbee.com, 28 Oct. 2026

Natural light reinforces your body clock, while regular activity supports sleep. — Emily Cegielski, Flow Space, 28 Oct. 2026

Word History

First Known Use

1916, in the meaning defined above

Rhymes for body clock

• aftershock
• antiknock
• arawak
• hollyhock
• interlock
• manioc
• shuttlecock
• tomahawk
• weathercock
• alcock
• beanstalk
• bedrock

Medical Definition

body clock

noun

-ˈkläk 

: the internal mechanisms that schedule bodily functions and activities

—not usually used technically