dĭastēma (short ĕ, Sid. Carm. 15, 64), ătis, n., = διάστημα, space between, distance, interval (late Lat.).
I In gen., Sid. Ep. 8, 11 med. —
II Esp., in music, an interval , Mart. Cap. 9, § 948; Censor. 13.
·noun A vacant space, or gap, ·esp. between teeth in a jaw. ...
Webster's Dictionary of the English Language