diaeresis
Latin > English (Lewis & Short)
dĭaerĕsis: is, f., = διαίρεσις>.
I In gram., the dividing of one syllable into two, as aquaï for aquae, Serv. ad Verg. A. 7, 464.—
II In rhet., a figure, pure Lat. distributio, distribution, Jul. Rufin. 21, p. 242.