- bisdiapason
- Disdiapason Dis*di`a*pa"son, n. [Pref. dis- (Gr. ?) + diapason.] (Anc. Mus.) An interval of two octaves, or a fifteenth; -- called also {bisdiapason}. Compare {diapason[1]}. [1913 Webster]
The Collaborative International Dictionary of English. 2000.