Lewis & Short

căsārĭus, a, um, adj. [casa], of or belonging to a cottage; only substt.,

  1. I. Că-sārĭus, ii, n., a dweller in a cottage, a cottager, Cod. Th. 9, 42, 7.
  2. II. Căsārĭa, quae custodit casam, Paul. ex Fest. p. 48 Müll.