-e(ˌ)lō noun
Etymology: Italian, diminutive of violone
1. : a bass violin that is the modern form of the viola da gamba with four strings tuned an octave lower than the viola and with a pitch compass of C to e″, that is held vertically on the floor between the player's knees while in a sitting position, and that when played produces a sonorous and expressive quality
2. : a labial pipe-organ stop of similar quality