A physiological mechanism that is thought to regulate physical and mental functions in chronological rhythm.
A daily rhythmic activity cycle, based on 24-hour intervals, that is exhibited by many organisms.
A recurring biological process, such as sleep, that is controlled by the circadian rhythms of an organism.
Find another word for biological-clock. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for biological-clock, like: body-clock, biological rhythm, circadian-rhythm, cycles, internal clock and biorhythm.