/ Dictionary / Index O oxygen acid: Meaning and Definition of Find definitions for: ox'ygen ac'id Pronunciation: [key] oxyacid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oxygen oxygenase Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language