English

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Etymology

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From tri- +‎ diapason.

Noun

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tridiapason (plural not attested)

  1. (music, historical) A triple octave, or twenty-second.[1]

References

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  1. ^ 1817, Thomas Busby, A Dictionary of Music, Theoretical and Practical

tridiapason”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.