Lewis & Short

discussĭo, ōnis, f. [discutio] (very rare).

  1. I. A shaking, Sen. Q. N. 6, 19, 2.
  2. II. An examination, discussion.
    1. A. In gen. (late Lat. for disputatio, quaestio): sequitur illa discussio, quid sit, etc., Macr. Somn. Scip. 1, 16, 8; Tert. Pudic. 11.
    2. B. In partic., in the later period of the empire, a revision of the public accounts in the provinces, Cod. Just. 10, 30, 1; Symm. Ep. 5, 74.