Dilogy

Origin

From Latin dilogia, from Ancient Greek διλογία (dilogía, "repetition"), from δίς (dís, "twice") + -λογία (-logía, "-logy")

Full definition of dilogy

Noun

1. Ambiguous or equivocal speech or discourse.
2. Repetition of a word or phrase.
3. A series of two related works
• 1885, The Journal of Hellenic studies: Volume 6, page 167why tragedy took the form of a trilogy — not a dilogy, tetralogy, or single drama
• 1983, Studies in Aeschylus, Reginald Pepys Winnington-Ingram, page 189another school of thought, for which Purphoros is a mirage, a mere doublet of Purkaeus, and there were never more than two linked Prometheus plays -- as it were a dilogy
• 2012, A New Companion to the Gothic, David Punter, Page 71Most notable of these are his “dilogy” The Salamander (1841) and The Cosmorama (1839)