Webster’s Revised Unabridged Dictionary · 1913
Dilogy
Dil′o·gy, n.; pl. Dilogies (#). [L. dilogia, Gr. διλογία, fr. δίλογος doubtful; δι- = δίς- twice + λέγειν to speak.] (Rhet.) An ambiguous speech; a figure in which a word is used an equivocal sense. [R.]