The Collaborative International Dictionary of English v.0.48:

Amphiboly \Am*phib"o*ly\, n.; pl. Amphibolies. [L. amphibolia,
   Gr. ?: cf. OE. amphibolie. See Amphibolous.]
   Ambiguous discourse; amphibology.
   [1913 Webster]

         If it oracle contrary to our interest or humor, we will
         create an amphiboly, a double meaning where there is
         none.                                    --Whitlock.
   [1913 Webster]