The Collaborative International Dictionary of English v.0.48:

Cursitor \Cur"si*tor\ (k?r"s?-t?r), n. [LL. cursitor, equiv. to
   L. cursor, fr. cursare to run hither and thither, fr. currere
   to run. See Current, and cf. Cursor.]
   1. A courier or runner. [Obs.] "Cursitors to and fro."
      --Holland.
      [1913 Webster]

   2. (Eng.Law) An officer in the Court of Chancery, whose
      business is to make out original writs.
      [1913 Webster]