/ Dictionary / Index O oxyaldehyde: Meaning and Definition of Find definitions for: ox•y•al•de•hyde Pronunciation: (ok"sē-al'du-hīd"), [key] — n. Chem. an aldehyde containing the hydroxyl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oxyacid oxybenzene Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language