necrotomy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Surgical excision of dead tissue.
• noun Dissection of a dead body.

from The Century Dictionary.

• noun Dissection of dead bodies.
• noun A surgical operation for the removal of necrosed bone.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) The dissection of dead bodies; also, excision of necrosed bone.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The dissection of a cadaver.
• noun medicine The surgical removal of dead tissue, especially bone.