bioˈrhythmicistn. a person who advocates or uses biorhythmics.
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the world > life > biology > biological processes > cycles of activity > [noun] > biorhythm > study of biorhythms > one who studies
biorhythmicist1972
1972 Time 10 Jan. 48/3 Although there has been no rational explanation so far for the claims of biorhythmicists, variations of the concept have been put to practical use in at least two countries.