The Collaborative International Dictionary of English v.0.48:

Sabbatism \Sab"ba*tism\, n. [L. sabbatismus, Gr. ?, fr. ? to
   keep the Sabbath: cf. F. sabbatisme. See Sabbath.]
   Intermission of labor, as upon the Sabbath; rest. --Dr. H.
   More.
   [1913 Webster]