: a phenolic amino acid C9H11NO4 occurring naturally (as in fava beans) or prepared synthetically (as from tyrosine) compare l-dopa

Examples of dopa in a Sentence

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Even so, the amount of L-dopa that actually reaches its destination varies widely from patient to patient for reasons that only recently became clear. Claudia Wallis, Scientific American, 1 Jan. 2020 Balskus and her team, meanwhile, are testing a molecule that would stop bacteria from breaking down L-dopa. Claudia Wallis, Scientific American, 1 Jan. 2020 Noradrenaline is synthesized in the body from dopamine, which in turn is metabolized from L-dopa. Denise Gellene, BostonGlobe.com, 2 July 2018 Yet with time and training, the kittens were able to walk again on treadmills, without any L-dopa or electrode stimulation at all. Nate Berg, Discover Magazine, 28 May 2013

Word History

Etymology

International Scientific Vocabulary dihydroxy- + phenylalanine

First Known Use

1917, in the meaning defined above

Time Traveler
The first known use of dopa was in 1917

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Cite this Entry

“Dopa.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dopa. Accessed 30 Jul. 2026.

Medical Definition

: an amino acid C9H11NO4 that in the levorotatory form is found in the broad bean and is used in the treatment of Parkinson's disease

called also dihydroxyphenylalanine

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