The antimisma, 1617/1600, is an 11-limit small comma. It is the amount by which 11/10 exceeds 160/147. It is also the difference between the ptolemisma (100/99) and the septimal diesis (49/48), making it an anti-ptolemisma, or anti-misma. However, that is not the origin of the name. In fact, it is named after Antimo Liberati, because his birth year of 1617 is the numerator of this comma.

Interval information
Ratio 1617/1600
Factorization 2-6 × 3 × 5-2 × 72 × 11
Monzo [-6 1 -2 2 1
Size in cents 18.29733¢
Name antimisma
Color name 1ozzgg2, lobizogu 2nd,
Lobizogu comma
FJS name [math]\displaystyle{ \text{d2}^{7,7,11}_{5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 21.303
Weil norm (log2 max(n, d)) 21.3182
Wilson norm (sopfr(nd)) 50
Comma size small
Open this interval in xen-calc

A stack of two septimal tritones (7/5) and an undecimal superfourth (11/8) is an antimisma above a perfect eleventh (8/3). While this leads to an essentially tempered chord of 1/1-7/5-49/25-8/3, it's rather far-flung.