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