Diazeuctic \Di`a*zeuc"tic\, Diazeutic \Di`a*zeu"tic\, a. [Gr. ?
disjunctive, fr. ? to disjoin; dia` through, asunder + ? to
join, yoke.] (Anc. Mus.)
Disjoining two fourths; as, the diazeutic tone, which, like
that from F to G in modern music, lay between two fourths,
and, being joined to either, made a fifth. [Obs.]
[1913 Webster]