Schismatic /(sĭz*măt"ĭk; so nearly all orthoepists)/

Schis·mat·ic

Schismatic

a.
  1. Of or pertaining to schism; implying schism; partaking of the nature of schism; tending to schism; as, schismatic opinions or proposals.

Schismatic

n.
  1. One who creates or takes part in schism; one who separates from an established church or religious communion on account of a difference of opinion.