antanagoge

from The Century Dictionary.

• noun In rhetoric, a figure which consists in replying to an adversary by recrimination, as when, the accusation made by one party being unanswerable, the accused person charges his accuser with the same or some other crime. Sometimes shortened to antagoge.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Rhet.) A figure which consists in answering the charge of an adversary, by a counter charge.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun rhetoric Answering the charge of an adversary by a countercharge.
• noun rhetoric Offsetting a proposition with an opposing proposition in one's own speech or writing.