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Etymology edit

First coined 1960, from bio- +‎ rhythm

Noun edit

biorhythm (plural biorhythms)

  1. (biology) Any cyclic biological or physiological pattern or activity.
  2. (pseudoscience) Any of three sinusoidal graphs, normally plotted by computer, having a person's birthdate as origin, that are claimed to give meaningful information about emotional levels, physical energy levels, and mental/psychic sensitivity.

Translations edit

See also edit