1. natural cycles in biological processes that occur regularly over time, such as sleep-wake cycles or seasonal changes in behavior
Usage: scientific
2. a pseudoscientific theory claiming that human life is influenced by rhythmic biological cycles that affect physical, emotional, and intellectual capacity
Usage: pseudoscientific

Examples

• Scientists study biorhythms to understand how our bodies respond to light and darkness.
• Jet lag occurs when travel disrupts our natural biorhythms.
• Many animals have biorhythms that help them migrate at the right time of year.
• The researcher investigated biorhythms in shift workers to improve their health.
• Some people believe biorhythms can predict their best and worst days.
• Plants also have biorhythms that control when they bloom and shed leaves.
• Understanding biorhythms helps doctors treat sleep disorders more effectively.