Meanings
- not comparableOccurring twice in a 24 hour period.
During early pregnancy, PRL secretion occurs in a semi-circadian rhythm, characterized by a large nocutrnal surge and a slightly smaller diurnal surge.
2020 August 12, Nira Ben-Jonathan, Dopamine: Endocrine and Oncogenic Functions, CRC Press, pages 88-892 more examples
In chronobiology, a circasemidian rhythm is a physiological arousal cycle that peaks twice in a 24-hour day. It may also be called the semicircadian rhythm .
2022 December 4, Wikipedia contributors, “Circasemidian rhythm”, in English Wikipedia, Wikimedia Foundation… individuals from a rocky shore with a rhythmic tidal pattern and a large tidal range exhibited a semicircadian activity rhythm (period around 12h), but no such rhythm was detected for fish from a rocky shore with an irregular tidal pattern and a small tide range.
2005 August 18, Adalberto Luis Val, Vera Maria Fonseca de Almeida e Val, David J. Randall, Fish Physiology: The Physiology of Tropical Fishes, Elsevie, page 120
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semicircadian. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/semicircadian
“semicircadian.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/semicircadian. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “semicircadian,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/semicircadian.
Source: semicircadian on Wiktionary, CC BY-SA 4.0.