/ Dictionary / Index D dopa: Meaning and Definition of Find definitions for: do•pa Pronunciation: (dō'pu), [key] — n. Biochem. an amino acid, CHNO, formed from tyrosine in the liver during melanin and epinephrine biosynthesis: the L-dopa isomer is converted in the brain to dopamine. Cf. levodopa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dopa (Thesaurus) dop dopamine Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language