Diatessaron

·noun The interval of a fourth.

II. Diatessaron ·noun An electuary compounded of four medicines.

III. Diatessaron ·noun A continuous narrative arranged from the first four books of the New Testament.

diatessaron
dĭătessărōn = διὰ τεσσάρων, n. indecl. I v. diapason.— II A medicine made of four ingredients , ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.