Definition of "grind organ" []

• A musical instrument that makes music by rotation of a cylinder studded with pegs (noun)

WordNet. Princeton University. 2010.

• "We passed a one-armed middle-aged man, also wearing a blue forage cap; he had a grind organ hanging from his neck by a strap and supported by a single leg; he was turning the handle with his one arm, cranking out — I listened to be sure, and yes, it was — "Hail, Hail, the Gang's All Here!""