D defs.my
Entry 1 sense Webster, 1913

Diazeuctic

· Di·a·zeuc·tic · IPA
01 a. 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…
  1. 1.
    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.(Anc. Mus.) [Obs.]