cir • ca • di • an – noting or pertaining to rhythmic biological cycles recurring at approximately 24-hour intervals.
pulse – A regular or rhythmical beating.
The band’s name is a variation of the term circadian rhythm. A circadian rhythm is an approximate daily periodicity, a roughly-24-hour cycle in the biochemical, physiological or behavioural processes of living beings. The term ‘circadian’ comes from the Latin circa, meaning ‘around’, and diem or dies, meaning ‘day’, meaning literally ‘approximately one day’.