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单词 biological clock
释义

WordReference Random House Learner's Dictionary of American English © 2024
bi•oˈlog•i•cal ˈclock, n. [countable]
  1. Physiologyan inborn mechanism of the body that controls its cycles, such as those of sleeping and waking.
  2. such a mechanism when it is seen as marking the passing of one's youth and esp. of a woman's ability to bear children:wanted to have a baby because she heard her biological clock ticking.

WordReference Random House Unabridged Dictionary of American English © 2024
biolog′ical clock′, [Physiol.]
  1. Physiologyan innate mechanism of the body that regulates its rhythmic and periodic cycles, as that of sleeping and waking.
  • 1950–55

Collins Concise English Dictionary © HarperCollins Publishers::
biological clock n
  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

See also circadian
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更新时间：2025/7/31 12:20:34