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

However, many people naturally get the urge to go first thing because their bodies follow a 24-hour internal clock known as the circadian rhythm. — Abby Norman, Verywell Health, 2 Nov. 2026

Research suggests standard time better aligns with our circadian rhythm, or internal clock, and reduces the risk of health complications. — Jackie Flynn Mogensen, Scientific American, 31 Oct. 2026

Researchers found that during long flights across the Atlantic, these birds become disoriented as their internal clock falls out of sync with the sun. — Brittney Melton, NPR, 30 Oct. 2026

Bright morning light, from a box or the sun, sets your body’s internal clock and helps regulate your sleep. — Caitlin Dewey, Vox, 29 Oct. 2026

Rhymes for internal clock

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