a cyclically recurring pattern of physiological states in an organism or organ, such as alpha rhythm or circadian rhythm; believed by some to affect physical and mental states and behaviour
WordReference Random House Learner's Dictionary of American English © 2025
bi•o•rhythm /ˈbaɪoʊˌrɪðəm/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- Physiologyan inborn cycle in an organism, such as sleep and wake cycles:biorhythms all confused after our traveling.
bi•o•rhythm
(bī′ō riᵺ′əm),USA pronunciation n.
bi′o•rhyth′mic, adj.
bi•o•rhyth•mic•i•ty
(bī′ō riᵺ mis′i tē),USA pronunciation n.
bi′o•rhyth′mist, bi′o•rhyth′mi•cist, n.
- Physiologyan innate periodicity in an organism's physiological processes, as sleep and wake cycles.
- 1960–65; bio- + rhythm
Collins Concise English Dictionary © HarperCollins Publishers::
'biorhythm' also found in these entries (note: many are not synonyms or translations):