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The word for today is…
circadian (adj) – (Biology) Relating to or exhibiting approximately 24-hour periodicity.
Source : The Free Dictionary
Etymology : In 1959, a scientist formed the word circadian from the Latin words circa (“about”) and dies (“day”), and it caught on quickly. Most often, it’s seen and heard in the term circadian rhythm, which refers to the inherent cycle of about 24 hours that appears to control various biological processes, such as sleep, wakefulness, and digestive activity. If you want to impress your friends, you can also use the term circadian dysrhythmia, a fancy synonym of jet lag.
