biorhythm

OXFORD DICTIONARY

biorhythm, n.
1 any of the recurring cycles of biological processes thought to affect a person's emotional, intellectual, and physical activity.
2 any periodic change in the behaviour or physiology of an organism.

Derivative

biorhythmic adj. biorhythmically adv.

THESAURUS

biorhythm

anima, animating force, atman, bathmism, beating heart, biological clock, blood, breath, breath of life, divine breath, divine spark, elan vital, essence of life, force of life, growth force, heart, heartbeat, heartblood, impulse of life, inspiriting force, jiva, jivatma, life breath, life cycle, life essence, life force, life principle, life process, lifeblood, living force, pneuma, prana, seat of life, soul, spark of life, spirit, vis vitae, vis vitalis, vital energy, vital flame, vital fluid, vital force, vital principle, vital spark, vital spirit