/ Dictionary / Index I isotimic: Meaning and Definition of Find definitions for: i•so•tim•ic Pronunciation: (ī"su-tim'ik), [key] — adj. Meteorol. (of a line or surface in space) having an equal value of some quantity at a given time. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isothiocyanate isotone Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language