The Collaborative International Dictionary of English v.0.48:

Reseizer \Re*seiz"er\ (-s?z"?r), n.
   1. One who seizes again.
      [1913 Webster]

   2. (Eng. Law) The taking of lands into the hands of the king
      where a general livery, or oustre le main, was formerly
      mis-sued, contrary to the form and order of law.
      [1913 Webster]