splenotomy

from The Collaborative International Dictionary of English v.0.48

Splenotomy \Sple*not"o*my\, n. [Gr. splh`n spleen + te`mnein to
   cut.]
   (a) (Anat.) Dissection or anatomy of the spleen.
   (b) (Med.) An incision into the spleen; removal of the spleen
       by incision.
       [1913 Webster]