biorhythm

/B AY0 OW0 R IH1 DH AH0 M/
noun
  1. 1

    Any cyclic biological or physiological pattern or activity

  2. 2

    (pseudoscience) Any of three sinusoidal graphs, normally plotted by computer, having a person's birthdate as origin, that that are supposed to give meaningful information about emotional levels, physical energy levels, and mental/psychic sensitivity.

Source: https://en.wiktionary.org/wiki/biorhythm