biological clock

noun

Definition of biological clock

  1. :  an inherent timing mechanism in a living system that is inferred to exist in order to explain the timing or periodicity of various behaviors and physiological states and processes

1941

First Known Use of biological clock

1941


BIOLOGICAL CLOCK Defined for English Language Learners

biological clock

noun

Definition of biological clock for English Language Learners

  • : a system in the body that controls the occurrence of natural processes (such as waking, sleeping, and aging)


Medical Dictionary

biological clock

noun

Medical Definition of biological clock

  1. :  an inherent timing mechanism in a living system (as a cell) that is inferred to exist in order to explain various cyclical behaviors and physiological processes


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