Source : Webster's Revised Unabridged Dictionary (1913)

Schismatize \Schis"ma*tize\, v. i. [imp. & p. p. {Schismatized};
   p. pr. & vb. n. {Schismatizing}.] [Cf. F. schismatiser.]
   To take part in schism; to make a breach of communion in the
   church.