/ Dictionary / Index O opal glass: Meaning and Definition of Find definitions for: o'pal glass" Pronunciation: [key] a translucent or opaque glass, usually of a milky white hue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. opaleye opaline Related Content Daily Word Quiz: benevolent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language