Disdiapason
Pronunciation : Dis*di`a*pa"son
Part of Speech : n.
Etymology : [Pref. dis- (Gr. diapason.] (Anc. Mus.)
Definition : Defn: An interval of two octaves, or a fifteenth; -- called also bisdiapason.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder