rebuttal

rebuttal
/-tl; -tl/ n
1 [U] act of rebutting or being rebutted 反驳; 反证
    produce evidence in rebuttal of the charge 提出反驳指控的证据.
2 [sing] evidence that rebuts a charge, etc 用以反驳指控等的证据; 反证.

牛津英汉双解词典