internal clock

noun

1

: a system in the body that controls when a person needs to sleep, eat, etc.

The long trip upset my internal clock and I had a hard time getting to sleep.

2

: a clock or timing device that is inside a computer

Examples of internal clock in a Sentence

Recent Examples on the Web

Erratic bedtimes and wake-up times can disrupt the hormones and physiologic functions that are regulated by your internal clock. — The Washington Post, San Diego Union-Tribune, 7 July 2026

Long-haul crossings of multiple time zones creates jet lag on arrival — the body’s internal clock remaining aligned to home time rather than local time, disrupting sleep, alertness and performance. — Alan McCall, New York Times, 28 June 2026

This relates to having a later internal clock compared with actual clock time. — Sally Ibrahim, The Conversation, 23 June 2026

Jennifer Martin, a professor at Florida International University's College of Medicine, explains that chronotypes are driven by the circadian rhythm—the body's internal clock that regulates sleep, alertness, and other essential daily functions. — Olivia McIntosh, Martha Stewart, 19 June 2026

Rhymes for internal clock

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