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diatessaron Definition

dia·tes·sa·ron (dī′ə tes′ə rän′)

noun

the four Gospels combined into a single account

Etymology: L(Ec) < Gr(Ec) (Evangelion) dia tessarōn, lit., (Gospel) through four, title of Tatian's harmony of four Gospels (2d c.) < Gr dia, through + tessarōn, gen. of tessares, four < IE base *kwetwer-, four