biological clock

noun
|Updated on: 27 Jul 2018

Definition of biological clock

: 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

Recent Examples of biological clock from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'biological clock.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of biological clock

1941

in the meaning defined above

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BIOLOGICAL CLOCK Defined for English Language Learners

biological clock

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

: 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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