/ Dictionary / Index I ionophore: Meaning and Definition of Find definitions for: i•on•o•phore Pronunciation: (ī-on'u-fôr", -fōr"), [key] — n. Biochem. a lipid-soluble substance capable of transporting specific ions through cellular membranes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ionopause ionosonde Related Content Daily Word Quiz: longevity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language