Source : Webster's Revised Unabridged Dictionary (1913)

Schesis \Sche"sis\, n. [NL., fr. Gr. ?, fr. ?, ?, to have or
   hold. See {Scheme}.]
   1. General state or disposition of the body or mind, or of
      one thing with regard to other things; habitude. [Obs.]
      --Norris.

   2. (Rhet.) A figure of speech whereby the mental habitude of
      an adversary or opponent is feigned for the purpose of
      arguing against him. --Crabb.