/ Dictionary / Index I isoelectronic: Meaning and Definition of Find definitions for: i•so•e•lec•tron•ic Pronunciation: (ī"sō-i-lek-tron'ik, -ē"lek-), [key] — adj. Physics, Chem. noting or pertaining to atoms and ions having an equal number of electrons. noting or pertaining to atoms, radicals, or ions having either an equal number of electrons or an equal number of valence electrons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isoelectric point isoenzyme 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