/ Dictionary / Index O opalescent: Meaning and Definition of Find definitions for: o•pal•es•cent Pronunciation: (ō"pu-les'unt), [key] — adj. exhibiting a play of colors like that of the opal. having a milky iridescence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: opalescent (Thesaurus) opalesce opaleye Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language