Lewis Short
dĭaerĕsis (noun F) : διαίρεσις.
* In gram., the dividing of one syllable into two, as aquaï for aquae,Serv. ad Verg. A. 7, 464.
* In rhet., a figure, pure Lat. distributio, distribution, Jul. Rufin. 21, p. 242.
Charlton T. Lewis, Charles Short, A Latin Dictionary