/ Dictionary / Index C chronon: Meaning and Definition of Find definitions for: chro•non Pronunciation: (krō'non), [key] — n. a hypothetical unit of time, taken as a ratio between the diameter of the electron and the velocity of light, equivalent to approximately 10− second. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chronometry chronopher Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language