/ Dictionary / Index D dihydroxy: Meaning and Definition of Find definitions for: di•hy•drox•y Pronunciation: (dī"hī-drok'sē), [key] — adj. Chem. (of a molecule) containing two hydroxyl groups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dihydrotachysterol dihydroxyphenylalanine 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