Circadian (adj)
sur-kay-dee-un
(of biological processes) recurring naturally on a twenty-four-hour cycle, even in the absence of light fluctuations.
1950s formed irregularly from Latin circa ‘about’ + dies ‘day’.
Example sentences
“The insects lived on a circadian rhythm.”
Word of the Day - Semiquincentennial (noun) se-mee-kwin-sen-tee-nee-al
