The Collaborative International Dictionary of English v.0.48:

Frater \Fra"ter\, n. [L., a brother.] (Eccl.)
   A monk; also, a frater house. [R.] --Shipley.
   [1913 Webster]

   Frater house, an apartament in a convent used as an eating
      room; a refectory; -- called also a fratery.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fratery \Fra"ter*y\ (? or ?), n. [L. frater brother: cf. It.
   frateria a brotherhood of monks. See Friar.]
   A frater house. See under Frater.
   [1913 Webster]