internal clock

American  

noun

1. biological clock.

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Etymology

Origin of internal clock

First recorded in 1955–60

Example Sentences

A new study suggests that disruptions in the body's internal clock may be tied to a higher risk of dementia.

From Science Daily

This internal clock is directed by the brain and responds to environmental signals, especially light.

From Science Daily

A later activity peak may reflect a mismatch between the body's internal clock and environmental signals such as daylight and darkness.

From Science Daily

In collaboration with Prof. Achim Kramer from the Charité -- Universitätsmedizin Berlin, the team also examined changes in the body's internal clock using isolated blood cells.

From Science Daily

Almost all cells in the body contain their own internal clock, which can be influenced by light, physical activity, and food timing.

From Science Daily