/ Dictionary / Index I iridous: Meaning and Definition of Find definitions for: ir•i•dous Pronunciation: (ir'i-dus, ī'ri-), [key] — adj. Chem. containing trivalent iridium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. iridotomy Iridum Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language