Wiktionary
n. (context physics English) A hypothetical quantum or particle of time.
Wikipedia
A chronon is a proposed quantum of time, that is, a discrete and indivisible "unit" of time as part of a hypothesis that proposes that time is not continuous.
Usage examples of "chronon".
All around you, throughout your life, unused chronons were being leached out, drawn away from the contiguous universe, until their pull on you was irresistible.
Probably a couple of the Calends or Chronons, who had come to Azlaroc to see their death sentence finally executed upon Chang Timmins.
Would the Calends and the Chronons think then that time was ruling the universe any more firmly than before?
He worried his own experiments might cause chronon ripples that could impact negatively on his ambitions to topple the entire principle of causality, that causes precede effects.
According to the theory, between each bead, each individual unit of time might exist in an infinite series of parallel universes, fitted into the probability gaps between the chronons.