Lewis Short
dĭastēma (noun N) = διάστημα: (short ĕ, Sid. Carm. 15, 64)
* Space between, distance, interval (late Lat.).
* In gen., Sid. Ep. 8, 11 med.
* Esp., in music, an interval, Mart. Cap. 9, § 948; Censor. 13.
Charlton T. Lewis, Charles Short, A Latin Dictionary