Biological clock
- Pronunciation
- /bi-uh-LAHJ-i-kuhl klok/
- Category
- Physiology
- Singular
- Biological clock
- Plural
- Biological clocks
Definition
An internal timing mechanism in organisms that regulates various biological processes, including sleep-wake cycles, feeding behavior, and hormone secretion.
Etymology
From Greek 'bios', meaning 'life', and 'chronos', meaning 'time'.
Example
The biological clock of many animals regulates their sleep patterns, causing them to be more active at night.
Related Terms
- Circadian rhythm
- Endogenous
- Entrainment
Usage Notes
Biological clocks are influenced by environmental cues like light and temperature but can operate independently in constant environments.