/ Dictionary / Index I isopor: Meaning and Definition of Find definitions for: i•so•por Pronunciation: (ī'su-pôr"), [key] — n. an imaginary line on the earth's surface connecting points of equal annual change in the declination, inclination, or other components of the earth's magnetic field. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isopolity isoprene Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language