Dī'a-tēs'sa-rōn, n.

n. [Gr. διατεσσάρων (sc. συμφωνία), from διά, through, and τεσσάρων, gen. of τέσσαρες, four (sc. χορδῶν).]

1. (Anc. Mus.) The concord or harmonic interval, composed of a greater tone, a lesser tone, and one greater semitone; — now called a fourth. Moore.
2. (Theol.) A harmony of the four Gospels.