Biological Clock Definition

bīə-lŏjĭ-kəl
noun
Any of the various natural cycles in organisms that are related to the tides, sun, moon, light, temperature, etc. and that control breeding, feeding, migration, etc.
Webster's New World
An internal mechanism in organisms that controls the periodicity of various functions or activities, such as metabolic changes, sleep cycles, or photosynthesis.
American Heritage Medicine
The time period during which a person who desires to have a biological child, especially a woman approaching the decline of reproductive capability, is still able to do so.
American Heritage Medicine
The capacity to be fertile, especially in such a woman.
American Heritage Medicine

(biology) Any of several mechanisms that regulate the periodicity of biological functions.

Wiktionary

Other Word Forms of Biological Clock

Noun

Singular:
biological clock
Plural:
biological-clocks

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biological clock

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