Mus. [f. BASS sb.5] An oblong piece of wood fixed lengthwise within the belly of various musical instruments of the violin type, to strengthen it against the pressure of the left foot of the bridge.
1838. Penny Mag., 30 June. The bar of harmony or bass-bar, was placed under the middle of the instrument.
1848. J. Bishop, trans. Ottos Violin, iv. 39. The same difficulty in bringing out the tone arises if the bass-bar is placed too far inwards, instead of being more under the foot of the bridge.