rejoinder
     n 1: a quick reply to a question or remark (especially a witty or
          critical one); "it brought a sharp rejoinder from the
          teacher" [syn: {retort}, {return}, {riposte}, {replication},
           {comeback}, {counter}]
     2: (law) a pleading made by a defendant in response to the
        plaintiff's replication
Source: WordNet® 2.0