Family of musical instruments including the piccolo, flute, clarinet, oboe, saxophone, bassoon, and other instruments (as opposed to the brass, string, and percussion families).
worm wheel
See Second wheel.
worm
See endless screw.
xylophone
1. Set of tuned wooden bars struck by hard or medium-hard mallets, producing a bright staccato sound. From the Greek language: xylo = wood + phon = sound. A popular extra instrument in coin pianos and orchestrions, especially American nickelodeons of the Prohibition era. See marimba. 2. Careless description of orchestra bells (which are of metal and thus by logical definition of the word, cannot be a xylophone).
Zinn pipe
German term used by Welte to identify a silver-colored tin alloy pipe found in the front row of most Welte orchestrions.