The Collaborative International Dictionary of English v.0.48:

Jurat \Ju"rat\, n. [Prov. F. jurat, fr. L. juratus sworn, p. p.
   of jurare to swear. See Jury, n.]
   [1913 Webster]
   1. A person under oath; specifically, an officer of the
      nature of an alderman, in certain municipal corporations
      in England. --Burrill.
      [1913 Webster]

   2. (Law) The memorandum or certificate at the end of an
      asffidavit, or a bill or answer in chancery, showing when,
      before whom, and (in English practice), where, it was
      sworn or affirmed. --Wharton. Bouvier.
      [1913 Webster]