Apophasis /(ȧ*pŏf"ȧ*sĭs)/

A·poph·a·sis

Apophasis

n.
  1. A figure by which a speaker formally declines to take notice of a favorable point, but in such a manner as to produce the effect desired. [For example, see Mark Antony's oration. Shak., Julius Cæsar, iii. 2.] (Rhet.)