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


dilogy ‎(plural dilogies)

  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 167
      why tragedy took the form of a trilogy — not a dilogy, tetralogy, or single drama
    • 1983, Studies in Aeschylus, Reginald Pepys Winnington-Ingram, 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)