zeitgeber
n.— «All three of us redefined our terms, they a zeitgeber and I a synchronizer (as primary or secondary), respectively, as an external agent, usually a cycle that does not “give” time and merely synchronizes existing body time with its own.» —“Transdisciplinary unifying implications of circadian findings in the 1950s” by Franz Halberg Journal of Circadian Rhythms Sept. 24, 2003. (source: Double-Tongued Dictionary)
Further reading
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...
An anadrome is a word that forms a whole new word when you spell it backwards. For example, the word “stressed” spelled backwards is “desserts.” Some people’s first names are anadromes. There’s the girl named Noel...