circadian
/sərˈkeɪdiən/
adjective
- Relating to the natural 24-hour cycle of physical, mental, and behavioral changes in living things, especially in response to light and darkness.
- Your circadian rhythm helps you feel sleepy at night and awake during the day.
- Exposure to bright light in the morning can help reset your circadian cycle.
- Shift workers often struggle with their circadian clock because they sleep at unusual hours.
Synonyms