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Related to biological clock: circadian rhythm
biological clock:see rhythm, biologicalrhythm, biological,
cyclic pattern of physiological changes or changes in activity in living organisms, most often synchronized with daily, monthly, or annual cyclical changes in the environment.
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biological clock[¦bī·ə¦läj·ə·kəl ′kläk]
Any physiologic factor that functions in regulating body rhythms.
1. an inherent periodicity in the physiological processes of living organisms that is not dependent on the periodicity of external factors
2. the hypothetical mechanism responsible for this periodicity