Diesis

The diesis (/ˈdaɪəsɪs/ DY-ə-sis) most commonly refers to:

• 128/125;
• Any interval about that size, e.g. a step of 31edo.

Intervals with the word in the name:

• greater diesis, 648/625
• small diesis, aka magic comma
• minimal diesis, aka tetracot comma
• septimal diesis, 49/48

See also

• Diesis - Wikipedia