/ Dictionary / Index D dihydroxyphenylalanine: Meaning and Definition of Find definitions for: di•hy•drox•y•phen•yl•al•a•nine Pronunciation: (dī"hī-drok'si-fen"l-al'u-nēn", -nin, -fēn"l-), [key] — n. Biochem. dopa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dihydroxyphenylalanine (Thesaurus) dihydroxy diiodomethane Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language