ablation (n.) Look up ablation at Dictionary.com
early 15c., "a carrying or taking away," in medicine, "mechanical removal of something harmful from the body," from Latin ablationem (nominative ablatio), "a taking away," noun of action from past participle stem of auferre "to carry away," from ab "off, away from" (see ab-) + the irregular verb ferre (past participle latum; see oblate) "to bear, carry."