The Collaborative International Dictionary of English v.0.48:

Eruct \E*ruct"\, Eructate \E*ruc"tate\, v. t. [L. eructare; e
   out + ructare to belch: cf. F. ['e]ructer.]
   To eject, as wind, from the stomach; to belch. [R.] --Howell.
   [1913 Webster]