John Langdon Haydon Down was a British physician best known for his description of the genetic condition Down's syndrome, which he originally classified in 1862. He is also noted for his work in social medicine and as a pioneer in the care of mentally disabled patients.
- Occupation
- physician, psychiatrist, neurologist
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- November 18, 1828
- Died
- October 7, 1896
