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.]
1. A person under oath; specifically, an officer of the
nature of an alderman, in certain municipal corporations
in England. --Burrill.
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.