Mary Elizabeth Hallock-Greenewalt was an inventor and pianist who performed with the Philadelphia and Pittsburgh symphonies as a soloist. She is best known for her invention of a type of visual music she called Nourathar.
- Occupation
- inventor, musician, musicologist, pianist
- Citizenship
- Lebanon, United States
- Born
- September 8, 1871
- Died
- November 26, 1950
