The Collaborative International Dictionary of English v.0.48:

Refutatory \Re*fut"a*to*ry\ (r[-e]*f[=u]t"[.a]*t[-o]*r[y^]), a.
   [L. refutatorius: cf. F. r['e]futatoire.]
   Tending to refute; refuting.
   [1913 Webster]