Dictionary

biorhythm

biorhythm

noun bio·rhythm \ˈbī-ō-ˌri-thəm\

: a natural, repeated pattern of changes that occur in the body and that affect the way a person feels

Full Definition of BIORHYTHM

:  an innately determined rhythmic biological process or function (as sleep behavior); also :  the internal mechanism that determines such a process or function
bio·rhyth·mic \-ˈrith-mik\ adjective

First Known Use of BIORHYTHM

1960

biorhythm

noun bio·rhythm \ˈbī-ō-ˌrith-əm\   (Medical Dictionary)

Medical Definition of BIORHYTHM

:  an innately determined rhythmic biological process or function (as sleep behavior); also :  an innate rhythmic determiner of such a process or function
bio·rhyth·mic \ˌbī-ō-ˈrith-mik\ adjective
bio·rhyth·mic·i·ty \-rith-ˈmis-ət-ē\ noun, plural bio·rhyth·mic·i·ties

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