ondiola

plural ondiolas

1. An electronic musical instrument, an Italian version of the clavioline.

   Much of Scelsi’s output was created in an unusual way: he would improvise on a piano, a guitar, percussion instruments or, later in his career, an ondiola, a three-octave electronic instrument that could capture vibrato and microtonal intervals.

   2015 September 20, Zachary Woolfe, “Review: Argento Chamber Ensemble’s ‘Scelsi Rediscovered’”, in New York Times