biorhythm /ˈbaɪ.oʊˌɹɪð.əm/ noun2 •Any cyclic biological or physiological pattern or activity. •Any of three sinusoidal graphs, normally plotted by a computer, containing a person's birthdate as an origin, that are claimed to provide meaningful information about emotional levels, physical energy levels, and mental or psychic sensitivity.Gay Biorhythms. Be Sure, Be Safe. Biorhythms charted for 1 year. Graphs or calendar. For more information write GCN Box 706. — 1977 formsbiorhythms
