
1) Choral instrument 2) Electronic musical instrument 3) Electronic musical instrument 4) High tremolo instrument 5) Instrument 6) Instrument with antennas 7) Melodic instrument 8) Musical instrument 9) Musical device 10) Musical doodad 11) Musical gadget 12) Musical apparatus 13) Musical gizmo 14) Music machine
Found on
https://www.crosswordclues.com/clue/theremin

The theremin (n {respell|THERR|ə-min}; originally known as the ætherphone/etherphone, thereminophone or termenvox/thereminvox), is an early electronic musical instrument controlled without physical contact by the thereminist (performer). It is named after the Westernized name of its Russian inventor, Léon Theremin, who patented the device in 19...
Found on
http://en.wikipedia.org/wiki/Theremin

electronic instrument with tones created by placing hands near oscillators
Found on
http://phrontistery.info/t.html

electronic musical instrument invented in 1920 in the Soviet Union by Leon Theremin (also called Lev Termen). It consists of a box with radio tubes ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/t/36
No exact match found.