biorhythm

B3I1O1R1H4Y4T1H4M3
US/ˈbaɪ.oʊˌɹɪð.əm/

noun

Any cyclic biological or physiological pattern or activity.

OriginEnglish rhythm ← Latin rhythmus ← Ancient Greek ῥῠθμός (rhŭthmós) →
UncommonScrabble 22
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Meanings

nounbiorhythm (plural biorhythms)

plural biorhythms

  1. biologyAny cyclic biological or physiological pattern or activity.
  2. pseudoscienceAny 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 February 5, “Personal advertisement”, in Gay Community News, volume 4, number 32, page 14

Synonyms & antonyms

Also see
biocycle

Origin

  1. Proto-Indo-European*gʷeyh₃-
  2. Ancient Greekβῐ́ος (bĭ́os)
  3. Ancient Greekβῐο- (bĭo-)
  4. Englishbio-
  5. Proto-Indo-European*ser-?
  6. Proto-Indo-European*srew-
  7. Proto-Indo-European*sru-dʰ-mo-s
  8. Proto-Hellenic*hrutʰmós
  9. Ancient Greekῥῠθμός (rhŭthmós)
  10. Latinrhythmus
  11. Englishrhythm
  12. Englishbiorhythm

First coined 1960, from bio- + rhythm.

Full word history & related roots →

Translations

Basque biorritmo
  • biorritmobiological pattern
Chinese Mandarin 生理節律 /生理节律, 生理週期圖 /生理周期图
  • 生理節律 /生理节律 (shēnglǐ jiélǜ)biological pattern
  • 生理週期圖 /生理周期图 (shēnglǐ zhōuqī tú)pseudoscience
Czech biorytmus
  • biorytmusbiological pattern
Finnish biorytmi, biorytmi
  • biorytmibiological pattern
  • biorytmipseudoscience
Hungarian bioritmus, bioritmus
  • bioritmusbiological pattern
  • bioritmuspseudoscience
Indonesian bioritme
  • bioritmebiological pattern
Italian bioritmo
  • bioritmobiological pattern
Polish biorytm, biorytm
  • biorytmbiological pattern
  • biorytmpseudoscience
Portuguese biorritmo, biorritmo
  • biorritmobiological pattern
  • biorritmopseudoscience
Cite this entry
APA

biorhythm. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/biorhythm

MLA

“biorhythm.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/biorhythm. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “biorhythm,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/biorhythm.

Source: biorhythm on Wiktionary, CC BY-SA 4.0.