irredentist

from WordNet (r) 3.0 (2006)

irredentist
    n 1: an advocate of irredentism [syn: {irredentist},
         {irridentist}]

from The Collaborative International Dictionary of English v.0.48

irredentist \irredentist\ n.
   an advocate of irredentism, especially a person in one
   country who advocates the incorporation of a region in
   another country related historically to his country.

   Syn: irridentist.
        [WordNet 1.5]