Source : Webster's Revised Unabridged Dictionary (1913)

Schismatical \Schis*mat"ic*al\, a.
   Same as {Schismatic}. -- {Schis*mat"ic*al*ly}, adv. --
   {Schis*mat"ic*al*ness}, n.

Source : WordNet®

schismatical
     adj : of or relating to or involved in or characteristic of
           schism; "schismatic sects" [syn: {schismatic}]