/ Dictionary / Index O oxidant smog: Meaning and Definition of Find definitions for: ox'i•dant smog" Pronunciation: (ok'si-dunt), [key] — Meteorol. Meteorol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oxidant oxidase Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language