sab·bat·i·cal /səˈbætɪkəl/
  (a.)安息日的,週期性休息的
  Sab·bat·ic Sab·bat·ic·al a.  Of or pertaining to the Sabbath; resembling the Sabbath; enjoying or bringing an intermission of labor.
  Sabbatical year Jewish Antiq., every seventh year, in which the Israelites were commanded to suffer their fields and vineyards to rest, or lie without tillage.
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  sabbatical
       adj 1: of or relating to the Sabbath; "Friday is a sabbatical day
              for Muslims" [syn: sabbatic]
       2: of or relating to sabbatical leave; "sabbatical research
          project"
       n : a leave usually taken every seventh year [syn: sabbatical
           leave]