dĭăpāsōn — Lewis & Short
dĭăpāsōn = dia\ pasw=n (sc. xordw=n), in music,
I the whole octave, Vitr. 5, 4, 8; Plaut. 2, 22, 20; Mart. Cap. 9, § 944; so too, dĭăpente = dia\ pe/nte, a fifth, Mart. Cap. 9, § 934 al.; dĭătessărōn = diatessa/rwn, a fourth, id. 2, § 107; Vitr. 5, 4, 8; disdĭăpāsōn = di\s dia\ pasw=n, a double octave, Plin. 2, 22, 20, § 84; Mart. Cap. 2, § 199 al. (All these words should perhaps be written here, as in Macr. Somn. Scip. 2, 1, in Greek letters.)