Kleisma
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The kleisma most commonly refers to:
- The interval 15625/15552;
- By extension, a melodic unit of about the size of 15625/15552 (≈ 8.1 ¢).
- In sagittal notation, it is defined specifically as between half of the 200-comma ([317 -200⟩) and half of the Pythagorean comma ([-19 12⟩);
- In scale theory, the difference between a chroma and a diesis, more precisely a moskleisma, as used in extended meantone notation.