Di"e*sis (?), n.; pl. Dieses (#). [NL., fr. Gr. , fr. to let go through, dissolve; through + to let go, send.]
1. Mus.
A small interval, less than any in actual practice, but used in the mathematical calculation of intervals.
2. Print.
The mark ‡; -- called also double dagger.
© Webster 1913.