Diatessaron

Chamber's Twientieth Century Dictionary · 1908 · p. 30

dī-a-tes′a-rōn, n. a harmony of the four gospels, esp. the earliest, that of Tatian (prob. 110-180 A.D.): ( mus. ) the interval of a fourth: an electuary of four ingredients. [Gr., for dia te arōn , through, or composed of four.]