/ Dictionary / Index I isoelectric point: Meaning and Definition of Find definitions for: isoelec'tric point" Pronunciation: [key] — Chem. Chem. the pH at which a substance is electrically neutral or at which it is at its minimum ionization. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isoelectric isoelectronic 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