/ Dictionary / Index N nonionic detergent: Meaning and Definition of Find definitions for: non•i•on'ic deter'gent Pronunciation: (non"ī-on'ik), [key] a detergent that is polar but does not ionize in aqueous solution. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. noninvasive noniron Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language