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Adullamite

noun
  1. a person who has withdrawn from a political group and joined with a few others to form a dissident group

Word Origin for Adullamite

C19: originally applied to members of the British House of Commons who withdrew from the Liberal party (1866); alluding to the cave of Adullam in the Bible, to which David and others fled (1 Samuel 22: 1–2)
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