A "grind organ" or "barrel organ" is a musical instrument that uses a crank to turn a cylinder containing metal or wooden pins. The pins pluck the keys of the instrument to create a tune. Synonyms for the word "grind organ" include "hurdy-gurdy," "street organ," and "hand organ." A hurdy-gurdy is a similar instrument that uses a crank to move a wheel which rubs against strings to create a sound, while a street organ is a larger version of a hand organ that is often seen on street corners. Each of these synonyms has a unique history and cultural significance, adding to the rich musical tapestry of our world.