Limma

The word limma or leimma (from Greek: λείμμα, leimma; meaning "remnant") can refer to several different musical intervals, whose only common property is their small size.

More specifically, in Pythagorean tuning (i.e. 3-limit):

• The original Pythagorean limma, 256/243, a Pythagorean interval (play^ⓘ).

and in 5-limit tuning:

• The 5-limit diatonic semitone, 16/15 (play^ⓘ). Although closer in size to the Pythagorean apotome than to the limma, it has been so called because of its function as a diatonic semitone rather than a chromatic one.
• The 5-limit limma (now a diesis), 128/125, the amount by which three just major thirds fall short of an octave (play^ⓘ).
• The major limma, 135/128, which is the difference between two major whole tones and a minor third (play^ⓘ).