bn:00010539n
Noun Concept
EN
biological clock
EN
An innate mechanism in living organisms that controls the periodicity of many physiological functions WordNet 3.0
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EN
An innate mechanism in living organisms that controls the periodicity of many physiological functions WordNet 3.0 & Open English WordNet
Any of several mechanisms that regulate the periodicity of biological functions. Wiktionary
WordNet 3.0 & Open English WordNet
Wiktionary