/ Dictionary / Index I iontophoresis: Meaning and Definition of Find definitions for: i•on•to•pho•re•sis Pronunciation: (ī-on"tu-fu-rē'sis), [key] — n. a painless alternative to drug injection in which a weak electrical current is used to stimulate drug-carrying ions to pass through intact skin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: iontophoresis (Thesaurus) ion propulsion I.O.O.F. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language