tridiapason
English
Etymology
tri- + diapason
Noun
tridiapason (plural not attested)
- (music, historical) A triple octave, or twenty-second[1].
References
- 1817, Thomas Busby, A Dictionary of Music, Theoretical and Practical
tridiapason in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913