Conventual church

from The Collaborative International Dictionary of English v.0.48

Conventual \Con*ven"tu*al\ (?; 135), a. [LL. conventualis: cf.
   F. conventuel.]
   Of or pertaining to a convent; monastic. "A conventual garb."
   --Macaulay.
   [1913 Webster]

   {Conventual church}, a church attached or belonging to a
      convent or monastery. --Wordsworth.
      [1913 Webster]