/ Dictionary / Index P pearl onion: Meaning and Definition of Find definitions for: pearl' on'ion Pronunciation: [key] a small white onion, often pickled and used as an appetizer or garnish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pearl molding pearl oyster Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language