[ kroh-non ]
/ ˈkroʊ nɒn /


a hypothetical unit of time, taken as a ratio between the diameter of the electron and the velocity of light, equivalent to approximately 10−24 second.

Origin of chronon

1975–80; < Greek chron(os) time + -on1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for chronon

  • A chronon is the length of time it takes one quantum of energy to push one electron from one electronic orbit to the next.

    The Ideal|Stanley Grauman Weinbaum

British Dictionary definitions for chronon

/ (ˈkrəʊnɒn) /


a unit of time equal to the time that a photon would take to traverse the diameter of an electron: about 10 –24 seconds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012