/ Dictionary / Index I ionogen: Meaning and Definition of Find definitions for: i•on•o•gen Pronunciation: (ī-on'u-jin, -jen"), [key] — n. Physics, Chem. any substance capable of producing ions, as an electrolyte. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. iono- ionomer Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language