Theremin

ahd-5
  • noun. An electronic instrument played by moving the hands near its two antennas, often used for high tremolo effects.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. An electronic musical instrument that generates sound of varying pitch and volume depending on the proximity of the musician’s hands to two antennae mounted on the instrument.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. an electronic musical instrument; melodies can be played by moving the right hand between two rods that serve as antennas to control pitch; the left hand controls phrasing