Parapyth
From Xenharmonic Reference
Parapyth, 17 & 41 & 46, is generally viewed as a no-5 2.3.7.11.13 rank-3 regular temperament, sometimes called Parapythic. (In the strict sense, parapyth is Margo Schulter's rank-3 tuning construct inspired by medieval European and Middle Eastern music theory, where Schulter imposes commas that are to be observed as well as commas that are to be tempered out.[citation needed])
Theory
The regular temperament Parapyth has two non-octave generators: the fifth (which is tuned in the gentle region) and the "spacer" 28/27, which is equated to 33/32.
