Zither n. : An instrument of music used in Austria and Germany. It has from thirty to forty wires strung across a shallow sounding-board, which lies horizontally on a table before the performer, who uses both hands in playing on it. [Not to be confounded with the old lute-shaped cittern, or cithern.]

Example:
What is a person who plays a Zither caled?

Taxonomy
Zither, instrument, free encyclopedia, strings, Concert zither, guqin, Chinese zither, History, family, stringed instruments, Guitar Zither, instrument family, Zither player, Chinese, popularity, multi-instrumentalist, fretless, fretless instrument.

Defination from the web:
zither is a musical string instrument, most commonly found in Slovenia, Austria, Hungary, the southern regions of Germany, alpine Europe and ... In more popular music, Australian-born singer Shirley Abicair popularised the zither when she used it widely as accompaniment in her popular TV ...