Kreutzer n. : A small copper coin formerly used in South Germany; also, a small Austrian copper coin.

Example:
Why is the Kreutzer Sonata called "Sonata no. 9 in A major"?

Taxonomy
Rodolphe Kreutzer, free encyclopedia, violin, the French, search, Unsourced, violinist, teacher, Biography, musician, royal chapel, lessons, virtuosi, soloist, professor, the Paris, co-author, violin method.

Defination from the web:
Kreutzer was born in Versailles, and was initially taught by his father, who was a musician in the royal chapel, with later lessons from Anton Stamitz. ... Free scores by Rodolphe Kreutzer in the International Music Score Library Project. www.closelinks.com Free Family Tree ...