/ Dictionary / Index I isoceraunic: Meaning and Definition of Find definitions for: i•so•ce•rau•nic Pronunciation: (ī"sō-si-rô'nik), [key] — adj. Meteorol. representing, having, or indicating equality in the frequency or intensity of thunderstorms: isoceraunic line; isoceraunic map. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isocephalic isochasm Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language