circadian cycle
Body's internal clock
A circadian cycle is the roughly 24-hour internal rhythm that governs biological processes like sleep, hormone release, and body temperature.
The cycle responds primarily to light and darkness, which is why jet lag and shift work disrupt it.
Her circadian cycle was completely thrown off after the red-eye flight.
- sleepRecurring unconscious repose
- deep sleepUnconsciousness hard to rouse
- wakePath left in water
- rhythmPatterned stress and silence
- melatoninCircadian rhythm regulator
sunrise · sunset · body clock · time zone · nocturnal · diurnal · alertness · early bird · morning person · night owl · drowsy · hormone · body temperature · light · blue light · darkness · REM · insomnia
circadian cycleweekly cycle
Seven-day recurring sequence
lunar cycle · menstrual cycle · seasonal cycle · seasonal rhythm · annual cycle
circadian, cycle, circa, circle, circular, circulate, circulation, circulatory, circuit