Dī'a-schĭz'mā, n.

(-skĭz'mā), n. [Gr. διάσχισμα, any thing cloven or cut off, from διασχίζειν, to cleave asunder, from διά, through, asunder, and σχίζειν, to cleave, split.] (Anc. Mus.) The difference between the comma and enharmonic diesis, commonly called the lesser comma.