dilogy

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

• IPA^(key): /ˈdɪləd͡ʒi/

dilogy (countable and uncountable, plural dilogies)

1. Ambiguous or equivocal speech or discourse.
2. Repetition of a word or phrase.
3. (countable, nonstandard) A series of two related works.
   • 1885, The Journal of Hellenic studies: Volume 6, page 167:

     why tragedy took the form of a trilogy — not a dilogy, tetralogy, or single drama

   • 1983, Reginald Pepys Winnington-Ingram, Studies in Aeschylus, page 189:

     another 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 71:

     Most notable of these are his “dilogy” The Salamander (1841) and The Cosmorama (1839)

• (two related works): duology (nonstandard)

• monology (1)
• trilogy (3)
• tetralogy (4)
• pentalogy (5)
• hexalogy (6)
• heptalogy (7)
• octalogy (8)
• ennealogy (9)
• decalogy (10)
• polylogy (2+)