/ Dictionary / Index I isoseismic: Meaning and Definition of Find definitions for: i•so•seis•mic Pronunciation: (ī"su-sīz'mik, -sīs'-), [key] — adj. Geol. noting or pertaining to equal intensity of earthquake shock. noting or pertaining to an imaginary line on the earth's surface connecting points characterized by such intensity. —n. an isoseismic line. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isosceles isosmotic Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language