/ Dictionary / Index I iris diaphragm shutter: Meaning and Definition of Find definitions for: i'ris di'aphragm shut"ter Pronunciation: [key] — Photog. Photog. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. iris diaphragm iris family 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