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sleep-wake cycle

[sleep-weyk] /ˈslipˈweɪk/
noun
1.
Physiology. the species-specific biological pattern of alternating sleep and wakefulness, in humans roughly 8 hours of nocturnal sleep and 16 hours of daytime activity.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for sleep-wake cycle
  • Melatonin is a naturally occurring hormone that helps regulate the sleep-wake cycle.
  • Melatonin is important in regulating the sleep-wake cycle.

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