The Collaborative International Dictionary of English v.0.48:

Resection \Re*sec"tion\ (r?-s?k"sh?n), n. [L. resectio: cf. F.
   r['e]section.]
   1. The act of cutting or paring off. --Cotgrave.
      [1913 Webster]

   2. (Surg.) The removal of the articular extremity of a bone,
      or of the ends of the bones in a false articulation.
      [1913 Webster]

WordNet (r) 3.0 (2006):

resection
    n 1: surgical removal of part of a structure or organ

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "resection":
   abscission, amputation, anastomotic operation, bloodless operation,
   butchering, capital operation, chopping, cleavage,
   compensating operation, corneal transplant, crescent operation,
   cutting, dichotomy, elective operation, emergency operation,
   enucleation, excision, exploratory operation,
   fenestration operation, fission, heart transplant,
   interval operation, kidney transplant, laceration, major operation,
   minor operation, mutilation, operation, organ transplant,
   organ transplantation, palliative operation, radical operation,
   removal, rending, ripping, scission, section, severance, slashing,
   slicing, splitting, surgery, surgical intervention,
   surgical operation, surgical technique, tearing, the knife,
   transplant