n.
The four Gospels combined into a single narrative.
[Middle English, interval of a fourth, from Latin diatessarōn, made of four (ingredients), from Greek dia tessarōn, out of four : dia, according to; see dia- + tessarōn, genitive of tessares, four.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
