splinter group

from WordNet (r) 3.0 (2006)

splinter group
    n 1: a faction or sect that has broken away from its parent
         organization

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "splinter group":
      breakaway group, camp, caucus, division, ethnic group, faction,
      interest, interest group, minority group, offshoot, party,
      political party, pressure group, sect, side, silent majority,
      splinter, vocal minority, wing