LAT

Lewis Short

dĭĕsis (noun F) = δίεσις: . In ancient music
* A quarter-tone, Vitr. 5, 4; Macr. Somn. Scip. 2, 1 fin.
* The first audible tone of an instrument, Vitr. 5, 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary

TLL

s. TLL
Thesaurus Linguae Latinae
memory