viola da gam·ba 
(gämbə, găm-)
(gämbə, găm-)n.
1. A stringed instrument, the bass of the viol family, with approximately the range of the cello. Also called bass viol, gamba, viol.
2. An organ stop of eight-foot pitch yielding tones similar to those of the viola da gamba.
[Italian : viola, viol + da, of, for + gamba, leg.]