/ Dictionary / Index O oro*: Meaning and Definition of Find definitions for: o•ro Pronunciation: (ô'rô), [key] — n. Spanish. gold. oro- Pronunciation: [key] a combining form meaning “mountain,” used in the formation of compound words: orography. oro- Pronunciation: [key] a combining form meaning “mouth,” used in the formation of compound words: oropharynx. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ornithosis orobanchaceous Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language