/ Dictionary / Index O opaline: Meaning and Definition of Find definitions for: o•pal•ine Pronunciation: (ō'pu-lin, -lēn", -līn"), [key] — adj. of or like opal; opalescent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: opaline (Thesaurus) opal glass Opa-Locka Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language