'Bass viol' definitions:

Definition of 'bass viol'

From: WordNet
noun
Viol that is the bass member of the viol family with approximately the range of the cello [syn: viola da gamba, gamba, bass viol]
noun
Largest and lowest member of the violin family [syn: bass fiddle, bass viol, bull fiddle, double bass, contrabass, string bass]

Definition of 'Bass viol'

From: GCIDE
  • Bass viol \Bass" vi`ol\ (Mus.) A stringed instrument of the viol family, used for playing bass. See 3d Bass, n., and Violoncello. [1913 Webster]