Lewis & Short

exemptĭo, ōnis, f. [eximo].

  1. I. In gen., a taking out, removing (not in Cic. or Caes.): alvi (apiarii), Varr. R. R. 3, 16, 34; cf. favorum, Col. 3, 18, 5: cretae, Dig. 19, 5, 16.
  2. II. In jurid. Lat., a detention of a person summoned before court, Dig. 2, 7, 5; cf. ib. 4.