The Collaborative International Dictionary of English v.0.48:

Remittitur \Re*mit"ti*tur\ (-t?-t?r), n. [L., (it) is remitted.]
   (Law)
      (a) A remission or surrender, -- remittitur damnut being
          a remission of excess of damages.
      (b) A sending back, as when a record is remitted by a
          superior to an inferior court. --Wharton.
          [1913 Webster]