/ Dictionary / Index I isochronal: Meaning and Definition of Find definitions for: i•soch•ro•nal Pronunciation: (ī-sok'ru-nl), [key] — adj. equal or uniform in time. performed in equal intervals of time. characterized by motions or vibrations of equal duration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: isochronal (Thesaurus) isochromatic isochrone Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language