/ Dictionary / Index M mother-of-pearl glass: Meaning and Definition of Find definitions for: moth'er-of-pearl' glass". Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mother-of-pearl cloud mother-of-thousands Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language