Acronymisma
17577/17576, the acronymisma, is an unnoticeable 31-limit (also 2.3.7.13.31-subgroup) comma measuring 0.10 cents. It is the difference between the tricesimoprimal kleisma, 217/216, and the threedie, 2197/2187.
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Etymology
The number 17576 is 26 cubed, and as there are 26 letters in the standard Latin alphabet, it is the number of distinct three-letter combinations or acronyms; the comma was named the "acronymisma" for this by Lériendil in 2025.