/ Dictionary / Index I iolite: Meaning and Definition of Find definitions for: i•o•lite Pronunciation: (ī'u-līt"), [key] — n. Mineral. cordierite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Iolanthe* Io moth Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language