The Collaborative International Dictionary of English v.0.48:

Regerminate \Re*ger"mi*nate\ (r?*j?r"m?*n?t), v. i. [Pref. re- +
   germinate: cf. L. regerminare.]
   To germinate again.
   [1913 Webster]

         Perennial plants regerminate several years
         successively.                            --J. Lee.
   [1913 Webster]