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Definitions

internal clock

NOUN
biological rhythm
Synonyms




Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

During adolescence, the body's internal clock naturally shifts later, meaning teenagers tend to feel alert later at night than adults do.

From Science Daily • Mar. 11, 2026

When it is bright, our internal clock feels we should be awake.

From BBC • Apr. 16, 2025

Additionally, disruptions to the body's internal clock can affect astronaut's sleeping and eating cycles.

From Salon • Mar. 15, 2025

The theory behind time-restricted eating is that it supports the circadian rhythm, or the body’s internal clock.

From Seattle Times • Jun. 1, 2024

No. His internal clock doesn’t work that way.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins