(n.) The act of amputating; esp. the operation of cutting off a limb or projecting part of the body.

abscission anastomotic operation annihilation bloodless operation butchering capital operation chopping cleavage compensating operation corneal transplant crescent operation cutting destruction dichotomy elective operation elimination emergency operation enucleation eradication excision exclusion exploratory operation extinction extirpation 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 rescission resection ripping scission section severance slashing slicing splitting surgery surgical intervention surgical operation surgical technique tearing the knife transplant