Biorhythm Definition
 bīō-rĭthəm 
  biorhythms
  
    noun
  
 Any biological cycle that involves periodic changes in blood pressure, body temperature, etc.: analyzed by some to predict behavior, temperament, etc.
 Webster's New World 
An innate, cyclical biological process or function.
 American Heritage Medicine 
(biology) Any cyclic biological or physiological pattern or activity.
Wiktionary 
(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.
Wiktionary 
Other Word Forms of Biorhythm
Noun
Singular:
 biorhythmPlural:
 biorhythmsOrigin of Biorhythm
-  
First coined 1960, from bio- + rhythm
From Wiktionary
 
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